Finding the Fourth Proportional to 75,655.50, 104,407.83 and 42,121.50

Step by Step Solution

1. Step 1: Write the proportion equation
   75,655.50 : 104,407.83 = 42,121.50 : x
2. Step 2: Convert to fraction form
   75,655.50/104,407.83 = 42,121.50/x
3. Step 3: Cross multiply
   75,655.50x = 104,407.83 × 42,121.50
4. Step 4: Simplify right side
   75,655.50x = 4,397,814,411.35
5. Step 5: Solve for x
   x = 4,397,814,411.35/75,655.50
6. Step 6: Final answer
   x = 58,129.47