Finding the Fourth Proportional to 12,345.62, 17,042.58 and 7,875.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,345.62 : 17,042.58 = 7,875.50 : x
2. Step 2: Convert to fraction form
   12,345.62/17,042.58 = 7,875.50/x
3. Step 3: Cross multiply
   12,345.62x = 17,042.58 × 7,875.50
4. Step 4: Simplify right side
   12,345.62x = 134,218,838.79
5. Step 5: Solve for x
   x = 134,218,838.79/12,345.62
6. Step 6: Final answer
   x = 10,871.78