Finding the Fourth Proportional to 131,422.32, 197,019.77 and 111,561.57

Step by Step Solution

1. Step 1: Write the proportion equation
   131,422.32 : 197,019.77 = 111,561.57 : x
2. Step 2: Convert to fraction form
   131,422.32/197,019.77 = 111,561.57/x
3. Step 3: Cross multiply
   131,422.32x = 197,019.77 × 111,561.57
4. Step 4: Simplify right side
   131,422.32x = 21,979,834,304.43
5. Step 5: Solve for x
   x = 21,979,834,304.43/131,422.32
6. Step 6: Final answer
   x = 167,245.82