Finding the Fourth Proportional to 158,528.73, 218,784.72 and 90,555.87

Step by Step Solution

1. Step 1: Write the proportion equation
   158,528.73 : 218,784.72 = 90,555.87 : x
2. Step 2: Convert to fraction form
   158,528.73/218,784.72 = 90,555.87/x
3. Step 3: Cross multiply
   158,528.73x = 218,784.72 × 90,555.87
4. Step 4: Simplify right side
   158,528.73x = 19,812,240,662.31
5. Step 5: Solve for x
   x = 19,812,240,662.31/158,528.73
6. Step 6: Final answer
   x = 124,975.71