Finding the Fourth Proportional to 89,241.08, 123,152.31 and 55,242.78

Step by Step Solution

1. Step 1: Write the proportion equation
   89,241.08 : 123,152.31 = 55,242.78 : x
2. Step 2: Convert to fraction form
   89,241.08/123,152.31 = 55,242.78/x
3. Step 3: Cross multiply
   89,241.08x = 123,152.31 × 55,242.78
4. Step 4: Simplify right side
   89,241.08x = 6,803,275,967.82
5. Step 5: Solve for x
   x = 6,803,275,967.82/89,241.08
6. Step 6: Final answer
   x = 76,234.81