Finding the Fourth Proportional to 89,439.21, 123,423.62 and 49,152.96

Step by Step Solution

1. Step 1: Write the proportion equation
   89,439.21 : 123,423.62 = 49,152.96 : x
2. Step 2: Convert to fraction form
   89,439.21/123,423.62 = 49,152.96/x
3. Step 3: Cross multiply
   89,439.21x = 123,423.62 × 49,152.96
4. Step 4: Simplify right side
   89,439.21x = 6,066,636,011.15
5. Step 5: Solve for x
   x = 6,066,636,011.15/89,439.21
6. Step 6: Final answer
   x = 67,829.71