Finding the Fourth Proportional to 56,641.02, 78,166.61 and 31,149.33

Step by Step Solution

1. Step 1: Write the proportion equation
   56,641.02 : 78,166.61 = 31,149.33 : x
2. Step 2: Convert to fraction form
   56,641.02/78,166.61 = 31,149.33/x
3. Step 3: Cross multiply
   56,641.02x = 78,166.61 × 31,149.33
4. Step 4: Simplify right side
   56,641.02x = 2,434,837,529.87
5. Step 5: Solve for x
   x = 2,434,837,529.87/56,641.02
6. Step 6: Final answer
   x = 42,987.18