Finding the Fourth Proportional to 13,124.28, 18,111.78 and 7,156.02

Step by Step Solution

1. Step 1: Write the proportion equation
   13,124.28 : 18,111.78 = 7,156.02 : x
2. Step 2: Convert to fraction form
   13,124.28/18,111.78 = 7,156.02/x
3. Step 3: Cross multiply
   13,124.28x = 18,111.78 × 7,156.02
4. Step 4: Simplify right side
   13,124.28x = 129,608,259.92
5. Step 5: Solve for x
   x = 129,608,259.92/13,124.28
6. Step 6: Final answer
   x = 9,875.46