Finding the Fourth Proportional to 158,558.50, 218,830.17 and 91,490.50

Step by Step Solution

1. Step 1: Write the proportion equation
   158,558.50 : 218,830.17 = 91,490.50 : x
2. Step 2: Convert to fraction form
   158,558.50/218,830.17 = 91,490.50/x
3. Step 3: Cross multiply
   158,558.50x = 218,830.17 × 91,490.50
4. Step 4: Simplify right side
   158,558.50x = 20,020,881,668.39
5. Step 5: Solve for x
   x = 20,020,881,668.39/158,558.50
6. Step 6: Final answer
   x = 126,268.11