Finding the Fourth Proportional to 9,122.31, 12,588.50 and 5,143.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,122.31 : 12,588.50 = 5,143.37 : x
2. Step 2: Convert to fraction form
   9,122.31/12,588.50 = 5,143.37/x
3. Step 3: Cross multiply
   9,122.31x = 12,588.50 × 5,143.37
4. Step 4: Simplify right side
   9,122.31x = 64,747,263.16
5. Step 5: Solve for x
   x = 64,747,263.16/9,122.31
6. Step 6: Final answer
   x = 7,097.68