Finding the Fourth Proportional to 10,088.78, 15,123.44 and 5,160.74

Step by Step Solution

1. Step 1: Write the proportion equation
   10,088.78 : 15,123.44 = 5,160.74 : x
2. Step 2: Convert to fraction form
   10,088.78/15,123.44 = 5,160.74/x
3. Step 3: Cross multiply
   10,088.78x = 15,123.44 × 5,160.74
4. Step 4: Simplify right side
   10,088.78x = 78,048,141.75
5. Step 5: Solve for x
   x = 78,048,141.75/10,088.78
6. Step 6: Final answer
   x = 7,736.13