Finding the Fourth Proportional to 56,997.72, 78,654.42 and 31,502.78

Step by Step Solution

1. Step 1: Write the proportion equation
   56,997.72 : 78,654.42 = 31,502.78 : x
2. Step 2: Convert to fraction form
   56,997.72/78,654.42 = 31,502.78/x
3. Step 3: Cross multiply
   56,997.72x = 78,654.42 × 31,502.78
4. Step 4: Simplify right side
   56,997.72x = 2,477,832,889.29
5. Step 5: Solve for x
   x = 2,477,832,889.29/56,997.72
6. Step 6: Final answer
   x = 43,472.49