Finding the Fourth Proportional to 89,438.54, 123,410.67 and 51,705.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,438.54 : 123,410.67 = 51,705.50 : x
2. Step 2: Convert to fraction form
   89,438.54/123,410.67 = 51,705.50/x
3. Step 3: Cross multiply
   89,438.54x = 123,410.67 × 51,705.50
4. Step 4: Simplify right side
   89,438.54x = 6,381,010,397.69
5. Step 5: Solve for x
   x = 6,381,010,397.69/89,438.54
6. Step 6: Final answer
   x = 71,345.20