Finding the Fourth Proportional to 85,434.86, 128,142.56 and 23,100.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,434.86 : 128,142.56 = 23,100.50 : x
2. Step 2: Convert to fraction form
   85,434.86/128,142.56 = 23,100.50/x
3. Step 3: Cross multiply
   85,434.86x = 128,142.56 × 23,100.50
4. Step 4: Simplify right side
   85,434.86x = 2,960,157,207.28
5. Step 5: Solve for x
   x = 2,960,157,207.28/85,434.86
6. Step 6: Final answer
   x = 34,648.12