Finding the Fourth Proportional to 89,688.31, 123,768.51 and 49,402.15

Step by Step Solution

1. Step 1: Write the proportion equation
   89,688.31 : 123,768.51 = 49,402.15 : x
2. Step 2: Convert to fraction form
   89,688.31/123,768.51 = 49,402.15/x
3. Step 3: Cross multiply
   89,688.31x = 123,768.51 × 49,402.15
4. Step 4: Simplify right side
   89,688.31x = 6,114,430,496.30
5. Step 5: Solve for x
   x = 6,114,430,496.30/89,688.31
6. Step 6: Final answer
   x = 68,174.22