Finding the Fourth Proportional to 912,070,401.72, 1,258,623,434.42 and 494,373,718.96

Step by Step Solution

1. Step 1: Write the proportion equation
   912,070,401.72 : 1,258,623,434.42 = 494,373,718.96 : x
2. Step 2: Convert to fraction form
   912,070,401.72/1,258,623,434.42 = 494,373,718.96/x
3. Step 3: Cross multiply
   912,070,401.72x = 1,258,623,434.42 × 494,373,718.96
4. Step 4: Simplify right side
   912,070,401.72x = 622,230,348,044,423,040
5. Step 5: Solve for x
   x = 622,230,348,044,423,040/912,070,401.72
6. Step 6: Final answer
   x = 682,217,454.78