Finding the Fourth Proportional to 9,398.01, 13,989.62 and 9,257.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,398.01 : 13,989.62 = 9,257.86 : x
2. Step 2: Convert to fraction form
   9,398.01/13,989.62 = 9,257.86/x
3. Step 3: Cross multiply
   9,398.01x = 13,989.62 × 9,257.86
4. Step 4: Simplify right side
   9,398.01x = 129,513,897.12
5. Step 5: Solve for x
   x = 129,513,897.12/9,398.01
6. Step 6: Final answer
   x = 13,780.99