Finding the Fourth Proportional to 9,938.86, 14,935.98 and 9,280.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,938.86 : 14,935.98 = 9,280.71 : x
2. Step 2: Convert to fraction form
   9,938.86/14,935.98 = 9,280.71/x
3. Step 3: Cross multiply
   9,938.86x = 14,935.98 × 9,280.71
4. Step 4: Simplify right side
   9,938.86x = 138,616,498.95
5. Step 5: Solve for x
   x = 138,616,498.95/9,938.86
6. Step 6: Final answer
   x = 13,946.92