Finding the Fourth Proportional to 151,632.72, 209,186.55 and 91,168.38

Step by Step Solution

1. Step 1: Write the proportion equation
   151,632.72 : 209,186.55 = 91,168.38 : x
2. Step 2: Convert to fraction form
   151,632.72/209,186.55 = 91,168.38/x
3. Step 3: Cross multiply
   151,632.72x = 209,186.55 × 91,168.38
4. Step 4: Simplify right side
   151,632.72x = 19,071,198,881.29
5. Step 5: Solve for x
   x = 19,071,198,881.29/151,632.72
6. Step 6: Final answer
   x = 125,772.32