Finding the Fourth Proportional to 160,025.81, 240,189.37 and 81,196.61

Step by Step Solution

1. Step 1: Write the proportion equation
   160,025.81 : 240,189.37 = 81,196.61 : x
2. Step 2: Convert to fraction form
   160,025.81/240,189.37 = 81,196.61/x
3. Step 3: Cross multiply
   160,025.81x = 240,189.37 × 81,196.61
4. Step 4: Simplify right side
   160,025.81x = 19,502,561,198.10
5. Step 5: Solve for x
   x = 19,502,561,198.10/160,025.81
6. Step 6: Final answer
   x = 121,871.35