Finding the Fourth Proportional to 138,022.42, 190,565.37 and 105,700.02

Step by Step Solution

1. Step 1: Write the proportion equation
   138,022.42 : 190,565.37 = 105,700.02 : x
2. Step 2: Convert to fraction form
   138,022.42/190,565.37 = 105,700.02/x
3. Step 3: Cross multiply
   138,022.42x = 190,565.37 × 105,700.02
4. Step 4: Simplify right side
   138,022.42x = 20,142,762,377.86
5. Step 5: Solve for x
   x = 20,142,762,377.86/138,022.42
6. Step 6: Final answer
   x = 145,938.33