Finding the Fourth Proportional to 10,095.30, 15,128.55 and 7,442.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,095.30 : 15,128.55 = 7,442.10 : x
2. Step 2: Convert to fraction form
   10,095.30/15,128.55 = 7,442.10/x
3. Step 3: Cross multiply
   10,095.30x = 15,128.55 × 7,442.10
4. Step 4: Simplify right side
   10,095.30x = 112,588,181.96
5. Step 5: Solve for x
   x = 112,588,181.96/10,095.30
6. Step 6: Final answer
   x = 11,152.53