Finding the Fourth Proportional to 56,700.81, 78,247.62 and 31,550.31

Step by Step Solution

1. Step 1: Write the proportion equation
   56,700.81 : 78,247.62 = 31,550.31 : x
2. Step 2: Convert to fraction form
   56,700.81/78,247.62 = 31,550.31/x
3. Step 3: Cross multiply
   56,700.81x = 78,247.62 × 31,550.31
4. Step 4: Simplify right side
   56,700.81x = 2,468,736,667.76
5. Step 5: Solve for x
   x = 2,468,736,667.76/56,700.81
6. Step 6: Final answer
   x = 43,539.71