Finding the Fourth Proportional to 1,243,985,401.88, 1,865,985,078.34 and 414,936,768.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243,985,401.88 : 1,865,985,078.34 = 414,936,768.52 : x
2. Step 2: Convert to fraction form
   1,243,985,401.88/1,865,985,078.34 = 414,936,768.52/x
3. Step 3: Cross multiply
   1,243,985,401.88x = 1,865,985,078.34 × 414,936,768.52
4. Step 4: Simplify right side
   1,243,985,401.88x = 774,265,818,510,096,000
5. Step 5: Solve for x
   x = 774,265,818,510,096,000/1,243,985,401.88
6. Step 6: Final answer
   x = 622,407,479.50