Finding the Fourth Proportional to 9,123.93, 12,598.15 and 7,140.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.93 : 12,598.15 = 7,140.14 : x
2. Step 2: Convert to fraction form
   9,123.93/12,598.15 = 7,140.14/x
3. Step 3: Cross multiply
   9,123.93x = 12,598.15 × 7,140.14
4. Step 4: Simplify right side
   9,123.93x = 89,952,534.53
5. Step 5: Solve for x
   x = 89,952,534.53/9,123.93
6. Step 6: Final answer
   x = 9,858.97