Finding the Fourth Proportional to 56,021.52, 77,309.31 and 30,871.02

Step by Step Solution

1. Step 1: Write the proportion equation
   56,021.52 : 77,309.31 = 30,871.02 : x
2. Step 2: Convert to fraction form
   56,021.52/77,309.31 = 30,871.02/x
3. Step 3: Cross multiply
   56,021.52x = 77,309.31 × 30,871.02
4. Step 4: Simplify right side
   56,021.52x = 2,386,616,868.65
5. Step 5: Solve for x
   x = 2,386,616,868.65/56,021.52
6. Step 6: Final answer
   x = 42,601.79