Finding the Fourth Proportional to 151,849.86, 209,543.55 and 91,440.06

Step by Step Solution

1. Step 1: Write the proportion equation
   151,849.86 : 209,543.55 = 91,440.06 : x
2. Step 2: Convert to fraction form
   151,849.86/209,543.55 = 91,440.06/x
3. Step 3: Cross multiply
   151,849.86x = 209,543.55 × 91,440.06
4. Step 4: Simplify right side
   151,849.86x = 19,160,674,784.61
5. Step 5: Solve for x
   x = 19,160,674,784.61/151,849.86
6. Step 6: Final answer
   x = 126,181.71