Finding the Fourth Proportional to 72,011.97, 99,360.61 and 41,779.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,011.97 : 99,360.61 = 41,779.78 : x
2. Step 2: Convert to fraction form
   72,011.97/99,360.61 = 41,779.78/x
3. Step 3: Cross multiply
   72,011.97x = 99,360.61 × 41,779.78
4. Step 4: Simplify right side
   72,011.97x = 4,151,264,426.47
5. Step 5: Solve for x
   x = 4,151,264,426.47/72,011.97
6. Step 6: Final answer
   x = 57,646.87