Finding the Fourth Proportional to 56,629.77, 78,145.05 and 31,135.49

Step by Step Solution

1. Step 1: Write the proportion equation
   56,629.77 : 78,145.05 = 31,135.49 : x
2. Step 2: Convert to fraction form
   56,629.77/78,145.05 = 31,135.49/x
3. Step 3: Cross multiply
   56,629.77x = 78,145.05 × 31,135.49
4. Step 4: Simplify right side
   56,629.77x = 2,433,084,441.90
5. Step 5: Solve for x
   x = 2,433,084,441.90/56,629.77
6. Step 6: Final answer
   x = 42,964.76