Finding the Fourth Proportional to 89,439.15, 123,420.05 and 49,152.05

Step by Step Solution

1. Step 1: Write the proportion equation
   89,439.15 : 123,420.05 = 49,152.05 : x
2. Step 2: Convert to fraction form
   89,439.15/123,420.05 = 49,152.05/x
3. Step 3: Cross multiply
   89,439.15x = 123,420.05 × 49,152.05
4. Step 4: Simplify right side
   89,439.15x = 6,066,347,790.06
5. Step 5: Solve for x
   x = 6,066,347,790.06/89,439.15
6. Step 6: Final answer
   x = 67,826.54