Finding the Fourth Proportional to 56,782, 78,361.86 and 31,631.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,782 : 78,361.86 = 31,631.50 : x
2. Step 2: Convert to fraction form
   56,782/78,361.86 = 31,631.50/x
3. Step 3: Cross multiply
   56,782x = 78,361.86 × 31,631.50
4. Step 4: Simplify right side
   56,782x = 2,478,703,174.59
5. Step 5: Solve for x
   x = 2,478,703,174.59/56,782
6. Step 6: Final answer
   x = 43,652.97