Finding the Fourth Proportional to 147,243.10, 203,189.94 and 89,978.18

Step by Step Solution

1. Step 1: Write the proportion equation
   147,243.10 : 203,189.94 = 89,978.18 : x
2. Step 2: Convert to fraction form
   147,243.10/203,189.94 = 89,978.18/x
3. Step 3: Cross multiply
   147,243.10x = 203,189.94 × 89,978.18
4. Step 4: Simplify right side
   147,243.10x = 18,282,659,979.56
5. Step 5: Solve for x
   x = 18,282,659,979.56/147,243.10
6. Step 6: Final answer
   x = 124,166.50