Finding the Fourth Proportional to 56,832.72, 78,429.24 and 31,681.68

Step by Step Solution

1. Step 1: Write the proportion equation
   56,832.72 : 78,429.24 = 31,681.68 : x
2. Step 2: Convert to fraction form
   56,832.72/78,429.24 = 31,681.68/x
3. Step 3: Cross multiply
   56,832.72x = 78,429.24 × 31,681.68
4. Step 4: Simplify right side
   56,832.72x = 2,484,770,084.32
5. Step 5: Solve for x
   x = 2,484,770,084.32/56,832.72
6. Step 6: Final answer
   x = 43,720.77