Finding the Fourth Proportional to 89,444.64, 123,440.96 and 57,679.68

Step by Step Solution

1. Step 1: Write the proportion equation
   89,444.64 : 123,440.96 = 57,679.68 : x
2. Step 2: Convert to fraction form
   89,444.64/123,440.96 = 57,679.68/x
3. Step 3: Cross multiply
   89,444.64x = 123,440.96 × 57,679.68
4. Step 4: Simplify right side
   89,444.64x = 7,120,035,071.69
5. Step 5: Solve for x
   x = 7,120,035,071.69/89,444.64
6. Step 6: Final answer
   x = 79,602.70