Finding the Fourth Proportional to 89,192.64, 123,169.16 and 57,416.76

Step by Step Solution

1. Step 1: Write the proportion equation
   89,192.64 : 123,169.16 = 57,416.76 : x
2. Step 2: Convert to fraction form
   89,192.64/123,169.16 = 57,416.76/x
3. Step 3: Cross multiply
   89,192.64x = 123,169.16 × 57,416.76
4. Step 4: Simplify right side
   89,192.64x = 7,071,974,099.12
5. Step 5: Solve for x
   x = 7,071,974,099.12/89,192.64
6. Step 6: Final answer
   x = 79,288.76