Finding the Fourth Proportional to 2,657,401.56, 3,986,734.52 and 860,284.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,657,401.56 : 3,986,734.52 = 860,284.89 : x
2. Step 2: Convert to fraction form
   2,657,401.56/3,986,734.52 = 860,284.89/x
3. Step 3: Cross multiply
   2,657,401.56x = 3,986,734.52 × 860,284.89
4. Step 4: Simplify right side
   2,657,401.56x = 3,429,727,463,695.98
5. Step 5: Solve for x
   x = 3,429,727,463,695.98/2,657,401.56
6. Step 6: Final answer
   x = 1,290,631.99