Finding the Fourth Proportional to 12,150.31, 18,228.01 and 5,130.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,150.31 : 18,228.01 = 5,130.35 : x
2. Step 2: Convert to fraction form
   12,150.31/18,228.01 = 5,130.35/x
3. Step 3: Cross multiply
   12,150.31x = 18,228.01 × 5,130.35
4. Step 4: Simplify right side
   12,150.31x = 93,516,008.27
5. Step 5: Solve for x
   x = 93,516,008.27/12,150.31
6. Step 6: Final answer
   x = 7,696.59