Finding the Fourth Proportional to 992,885.72, 1,478,098.15 and 986,980.76

Step by Step Solution

1. Step 1: Write the proportion equation
   992,885.72 : 1,478,098.15 = 986,980.76 : x
2. Step 2: Convert to fraction form
   992,885.72/1,478,098.15 = 986,980.76/x
3. Step 3: Cross multiply
   992,885.72x = 1,478,098.15 × 986,980.76
4. Step 4: Simplify right side
   992,885.72x = 1,458,854,435,441.59
5. Step 5: Solve for x
   x = 1,458,854,435,441.59/992,885.72
6. Step 6: Final answer
   x = 1,469,307.50