Finding the Fourth Proportional to 89,432, 123,416.64 and 49,688

Step by Step Solution

1. Step 1: Write the proportion equation
   89,432 : 123,416.64 = 49,688 : x
2. Step 2: Convert to fraction form
   89,432/123,416.64 = 49,688/x
3. Step 3: Cross multiply
   89,432x = 123,416.64 × 49,688
4. Step 4: Simplify right side
   89,432x = 6,132,326,008.32
5. Step 5: Solve for x
   x = 6,132,326,008.32/89,432
6. Step 6: Final answer
   x = 68,569.71