Finding the Fourth Proportional to 89,439.15, 123,428.30 and 49,153.94

Step by Step Solution

1. Step 1: Write the proportion equation
   89,439.15 : 123,428.30 = 49,153.94 : x
2. Step 2: Convert to fraction form
   89,439.15/123,428.30 = 49,153.94/x
3. Step 3: Cross multiply
   89,439.15x = 123,428.30 × 49,153.94
4. Step 4: Simplify right side
   89,439.15x = 6,066,987,252.50
5. Step 5: Solve for x
   x = 6,066,987,252.50/89,439.15
6. Step 6: Final answer
   x = 67,833.69