Finding the Fourth Proportional to 12,345.64, 17,042.60 and 7,875.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,345.64 : 17,042.60 = 7,875.52 : x
2. Step 2: Convert to fraction form
   12,345.64/17,042.60 = 7,875.52/x
3. Step 3: Cross multiply
   12,345.64x = 17,042.60 × 7,875.52
4. Step 4: Simplify right side
   12,345.64x = 134,219,337.15
5. Step 5: Solve for x
   x = 134,219,337.15/12,345.64
6. Step 6: Final answer
   x = 10,871.80