Finding the Fourth Proportional to 55,057.86, 75,985.16 and 30,862.91

Step by Step Solution

1. Step 1: Write the proportion equation
   55,057.86 : 75,985.16 = 30,862.91 : x
2. Step 2: Convert to fraction form
   55,057.86/75,985.16 = 30,862.91/x
3. Step 3: Cross multiply
   55,057.86x = 75,985.16 × 30,862.91
4. Step 4: Simplify right side
   55,057.86x = 2,345,123,362.20
5. Step 5: Solve for x
   x = 2,345,123,362.20/55,057.86
6. Step 6: Final answer
   x = 42,593.80