Finding the Fourth Proportional to 56,605.72, 78,116.71 and 31,114.45

Step by Step Solution

1. Step 1: Write the proportion equation
   56,605.72 : 78,116.71 = 31,114.45 : x
2. Step 2: Convert to fraction form
   56,605.72/78,116.71 = 31,114.45/x
3. Step 3: Cross multiply
   56,605.72x = 78,116.71 × 31,114.45
4. Step 4: Simplify right side
   56,605.72x = 2,430,557,921.30
5. Step 5: Solve for x
   x = 2,430,557,921.30/56,605.72
6. Step 6: Final answer
   x = 42,938.38