Finding the Fourth Proportional to 142,166.72, 196,186.38 and 91,127

Step by Step Solution

1. Step 1: Write the proportion equation
   142,166.72 : 196,186.38 = 91,127 : x
2. Step 2: Convert to fraction form
   142,166.72/196,186.38 = 91,127/x
3. Step 3: Cross multiply
   142,166.72x = 196,186.38 × 91,127
4. Step 4: Simplify right side
   142,166.72x = 17,877,876,250.26
5. Step 5: Solve for x
   x = 17,877,876,250.26/142,166.72
6. Step 6: Final answer
   x = 125,752.89