Finding the Fourth Proportional to 72,090.76, 99,470.82 and 40,254.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,090.76 : 99,470.82 = 40,254.76 : x
2. Step 2: Convert to fraction form
   72,090.76/99,470.82 = 40,254.76/x
3. Step 3: Cross multiply
   72,090.76x = 99,470.82 × 40,254.76
4. Step 4: Simplify right side
   72,090.76x = 4,004,173,986.10
5. Step 5: Solve for x
   x = 4,004,173,986.10/72,090.76
6. Step 6: Final answer
   x = 55,543.51