Finding the Fourth Proportional to 56,709.06, 78,261.57 and 31,559.10

Step by Step Solution

1. Step 1: Write the proportion equation
   56,709.06 : 78,261.57 = 31,559.10 : x
2. Step 2: Convert to fraction form
   56,709.06/78,261.57 = 31,559.10/x
3. Step 3: Cross multiply
   56,709.06x = 78,261.57 × 31,559.10
4. Step 4: Simplify right side
   56,709.06x = 2,469,864,713.79
5. Step 5: Solve for x
   x = 2,469,864,713.79/56,709.06
6. Step 6: Final answer
   x = 43,553.26