Finding the Fourth Proportional to 72,259.02, 108,399.78 and 42,698.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,259.02 : 108,399.78 = 42,698.16 : x
2. Step 2: Convert to fraction form
   72,259.02/108,399.78 = 42,698.16/x
3. Step 3: Cross multiply
   72,259.02x = 108,399.78 × 42,698.16
4. Step 4: Simplify right side
   72,259.02x = 4,628,471,150.40
5. Step 5: Solve for x
   x = 4,628,471,150.40/72,259.02
6. Step 6: Final answer
   x = 64,053.89