Finding the Fourth Proportional to 72,323.78, 99,810.52 and 40,490.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,323.78 : 99,810.52 = 40,490.78 : x
2. Step 2: Convert to fraction form
   72,323.78/99,810.52 = 40,490.78/x
3. Step 3: Cross multiply
   72,323.78x = 99,810.52 × 40,490.78
4. Step 4: Simplify right side
   72,323.78x = 4,041,405,807.01
5. Step 5: Solve for x
   x = 4,041,405,807.01/72,323.78
6. Step 6: Final answer
   x = 55,879.35