Finding the Fourth Proportional to 89,071.03, 122,858.89 and 57,280.15

Step by Step Solution

1. Step 1: Write the proportion equation
   89,071.03 : 122,858.89 = 57,280.15 : x
2. Step 2: Convert to fraction form
   89,071.03/122,858.89 = 57,280.15/x
3. Step 3: Cross multiply
   89,071.03x = 122,858.89 × 57,280.15
4. Step 4: Simplify right side
   89,071.03x = 7,037,375,361.63
5. Step 5: Solve for x
   x = 7,037,375,361.63/89,071.03
6. Step 6: Final answer
   x = 79,008.58