Finding the Fourth Proportional to 142,992.77, 197,167.43 and 91,240.25

Step by Step Solution

1. Step 1: Write the proportion equation
   142,992.77 : 197,167.43 = 91,240.25 : x
2. Step 2: Convert to fraction form
   142,992.77/197,167.43 = 91,240.25/x
3. Step 3: Cross multiply
   142,992.77x = 197,167.43 × 91,240.25
4. Step 4: Simplify right side
   142,992.77x = 17,989,604,847.32
5. Step 5: Solve for x
   x = 17,989,604,847.32/142,992.77
6. Step 6: Final answer
   x = 125,807.80