Finding the Fourth Proportional to 89,196.89, 123,156.29 and 57,421.14

Step by Step Solution

1. Step 1: Write the proportion equation
   89,196.89 : 123,156.29 = 57,421.14 : x
2. Step 2: Convert to fraction form
   89,196.89/123,156.29 = 57,421.14/x
3. Step 3: Cross multiply
   89,196.89x = 123,156.29 × 57,421.14
4. Step 4: Simplify right side
   89,196.89x = 7,071,774,282.86
5. Step 5: Solve for x
   x = 7,071,774,282.86/89,196.89
6. Step 6: Final answer
   x = 79,282.75