Finding the Fourth Proportional to 2,658,841.53, 3,987,425.77 and 861,307.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658,841.53 : 3,987,425.77 = 861,307.96 : x
2. Step 2: Convert to fraction form
   2,658,841.53/3,987,425.77 = 861,307.96/x
3. Step 3: Cross multiply
   2,658,841.53x = 3,987,425.77 × 861,307.96
4. Step 4: Simplify right side
   2,658,841.53x = 3,434,401,538,538.91
5. Step 5: Solve for x
   x = 3,434,401,538,538.91/2,658,841.53
6. Step 6: Final answer
   x = 1,291,690.95