Finding the Fourth Proportional to 9,112.31, 12,575.03 and 5,133.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,112.31 : 12,575.03 = 5,133.50 : x
2. Step 2: Convert to fraction form
   9,112.31/12,575.03 = 5,133.50/x
3. Step 3: Cross multiply
   9,112.31x = 12,575.03 × 5,133.50
4. Step 4: Simplify right side
   9,112.31x = 64,553,827.96
5. Step 5: Solve for x
   x = 64,553,827.96/9,112.31
6. Step 6: Final answer
   x = 7,084.25