Finding the Fourth Proportional to 56,139.50, 77,472.70 and 30,646.43

Step by Step Solution

1. Step 1: Write the proportion equation
   56,139.50 : 77,472.70 = 30,646.43 : x
2. Step 2: Convert to fraction form
   56,139.50/77,472.70 = 30,646.43/x
3. Step 3: Cross multiply
   56,139.50x = 77,472.70 × 30,646.43
4. Step 4: Simplify right side
   56,139.50x = 2,374,261,458.50
5. Step 5: Solve for x
   x = 2,374,261,458.50/56,139.50
6. Step 6: Final answer
   x = 42,292.18