Finding the Fourth Proportional to 89,405.32, 123,378.84 and 49,118.20

Step by Step Solution

1. Step 1: Write the proportion equation
   89,405.32 : 123,378.84 = 49,118.20 : x
2. Step 2: Convert to fraction form
   89,405.32/123,378.84 = 49,118.20/x
3. Step 3: Cross multiply
   89,405.32x = 123,378.84 × 49,118.20
4. Step 4: Simplify right side
   89,405.32x = 6,060,146,538.89
5. Step 5: Solve for x
   x = 6,060,146,538.89/89,405.32
6. Step 6: Final answer
   x = 67,782.84