Finding the Fourth Proportional to 13,133.31, 18,123.88 and 7,468.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,133.31 : 18,123.88 = 7,468.05 : x
2. Step 2: Convert to fraction form
   13,133.31/18,123.88 = 7,468.05/x
3. Step 3: Cross multiply
   13,133.31x = 18,123.88 × 7,468.05
4. Step 4: Simplify right side
   13,133.31x = 135,350,068.40
5. Step 5: Solve for x
   x = 135,350,068.40/13,133.31
6. Step 6: Final answer
   x = 10,305.86