Finding the Fourth Proportional to 56,559.81, 78,053.17 and 31,066.77

Step by Step Solution

1. Step 1: Write the proportion equation
   56,559.81 : 78,053.17 = 31,066.77 : x
2. Step 2: Convert to fraction form
   56,559.81/78,053.17 = 31,066.77/x
3. Step 3: Cross multiply
   56,559.81x = 78,053.17 × 31,066.77
4. Step 4: Simplify right side
   56,559.81x = 2,424,859,762.69
5. Step 5: Solve for x
   x = 2,424,859,762.69/56,559.81
6. Step 6: Final answer
   x = 42,872.49