Finding the Fourth Proportional to 56,557.37, 78,050.11 and 31,066.09

Step by Step Solution

1. Step 1: Write the proportion equation
   56,557.37 : 78,050.11 = 31,066.09 : x
2. Step 2: Convert to fraction form
   56,557.37/78,050.11 = 31,066.09/x
3. Step 3: Cross multiply
   56,557.37x = 78,050.11 × 31,066.09
4. Step 4: Simplify right side
   56,557.37x = 2,424,711,878.17
5. Step 5: Solve for x
   x = 2,424,711,878.17/56,557.37
6. Step 6: Final answer
   x = 42,871.72