Finding the Fourth Proportional to 101,760.50, 140,422.50 and 56,434.23

Step by Step Solution

1. Step 1: Write the proportion equation
   101,760.50 : 140,422.50 = 56,434.23 : x
2. Step 2: Convert to fraction form
   101,760.50/140,422.50 = 56,434.23/x
3. Step 3: Cross multiply
   101,760.50x = 140,422.50 × 56,434.23
4. Step 4: Simplify right side
   101,760.50x = 7,924,635,662.18
5. Step 5: Solve for x
   x = 7,924,635,662.18/101,760.50
6. Step 6: Final answer
   x = 77,875.36