Finding the Fourth Proportional to 89,387.20, 123,253.25 and 57,079.34

Step by Step Solution

1. Step 1: Write the proportion equation
   89,387.20 : 123,253.25 = 57,079.34 : x
2. Step 2: Convert to fraction form
   89,387.20/123,253.25 = 57,079.34/x
3. Step 3: Cross multiply
   89,387.20x = 123,253.25 × 57,079.34
4. Step 4: Simplify right side
   89,387.20x = 7,035,213,261.19
5. Step 5: Solve for x
   x = 7,035,213,261.19/89,387.20
6. Step 6: Final answer
   x = 78,704.93