Finding the Fourth Proportional to 56,709.31, 78,259.35 and 31,558.81

Step by Step Solution

1. Step 1: Write the proportion equation
   56,709.31 : 78,259.35 = 31,558.81 : x
2. Step 2: Convert to fraction form
   56,709.31/78,259.35 = 31,558.81/x
3. Step 3: Cross multiply
   56,709.31x = 78,259.35 × 31,558.81
4. Step 4: Simplify right side
   56,709.31x = 2,469,771,957.37
5. Step 5: Solve for x
   x = 2,469,771,957.37/56,709.31
6. Step 6: Final answer
   x = 43,551.44