Finding the Fourth Proportional to 55,839.30, 77,057.34 and 30,688.26

Step by Step Solution

1. Step 1: Write the proportion equation
   55,839.30 : 77,057.34 = 30,688.26 : x
2. Step 2: Convert to fraction form
   55,839.30/77,057.34 = 30,688.26/x
3. Step 3: Cross multiply
   55,839.30x = 77,057.34 × 30,688.26
4. Step 4: Simplify right side
   55,839.30x = 2,364,755,684.83
5. Step 5: Solve for x
   x = 2,364,755,684.83/55,839.30
6. Step 6: Final answer
   x = 42,349.31