Finding the Fourth Proportional to 56,781, 78,360.48 and 31,630.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,781 : 78,360.48 = 31,630.50 : x
2. Step 2: Convert to fraction form
   56,781/78,360.48 = 31,630.50/x
3. Step 3: Cross multiply
   56,781x = 78,360.48 × 31,630.50
4. Step 4: Simplify right side
   56,781x = 2,478,581,162.64
5. Step 5: Solve for x
   x = 2,478,581,162.64/56,781
6. Step 6: Final answer
   x = 43,651.59