Finding the Fourth Proportional to 56,857, 78,462.66 and 31,705.96

Step by Step Solution

1. Step 1: Write the proportion equation
   56,857 : 78,462.66 = 31,705.96 : x
2. Step 2: Convert to fraction form
   56,857/78,462.66 = 31,705.96/x
3. Step 3: Cross multiply
   56,857x = 78,462.66 × 31,705.96
4. Step 4: Simplify right side
   56,857x = 2,487,733,959.45
5. Step 5: Solve for x
   x = 2,487,733,959.45/56,857
6. Step 6: Final answer
   x = 43,754.22