Finding the Fourth Proportional to 73,781, 101,818.50 and 40,247.72

Step by Step Solution

1. Step 1: Write the proportion equation
   73,781 : 101,818.50 = 40,247.72 : x
2. Step 2: Convert to fraction form
   73,781/101,818.50 = 40,247.72/x
3. Step 3: Cross multiply
   73,781x = 101,818.50 × 40,247.72
4. Step 4: Simplify right side
   73,781x = 4,097,962,478.82
5. Step 5: Solve for x
   x = 4,097,962,478.82/73,781
6. Step 6: Final answer
   x = 55,542.25