Finding the Fourth Proportional to 9,417.15, 12,990.71 and 7,175.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,417.15 : 12,990.71 = 7,175.13 : x
2. Step 2: Convert to fraction form
   9,417.15/12,990.71 = 7,175.13/x
3. Step 3: Cross multiply
   9,417.15x = 12,990.71 × 7,175.13
4. Step 4: Simplify right side
   9,417.15x = 93,210,050.98
5. Step 5: Solve for x
   x = 93,210,050.98/9,417.15
6. Step 6: Final answer
   x = 9,897.90