Finding the Fourth Proportional to 1,015,155,430.07, 1,401,373,523.69 and 639,364,297.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015,155,430.07 : 1,401,373,523.69 = 639,364,297.17 : x
2. Step 2: Convert to fraction form
   1,015,155,430.07/1,401,373,523.69 = 639,364,297.17/x
3. Step 3: Cross multiply
   1,015,155,430.07x = 1,401,373,523.69 × 639,364,297.17
4. Step 4: Simplify right side
   1,015,155,430.07x = 895,988,198,040,002,944
5. Step 5: Solve for x
   x = 895,988,198,040,002,944/1,015,155,430.07
6. Step 6: Final answer
   x = 882,611,836.08