Finding the Fourth Proportional to 72,304.47, 99,782.28 and 40,472.55

Step by Step Solution

1. Step 1: Write the proportion equation
   72,304.47 : 99,782.28 = 40,472.55 : x
2. Step 2: Convert to fraction form
   72,304.47/99,782.28 = 40,472.55/x
3. Step 3: Cross multiply
   72,304.47x = 99,782.28 × 40,472.55
4. Step 4: Simplify right side
   72,304.47x = 4,038,443,316.41
5. Step 5: Solve for x
   x = 4,038,443,316.41/72,304.47
6. Step 6: Final answer
   x = 55,853.30