Finding the Fourth Proportional to 83,443.68, 115,091.28 and 60,789.60

Step by Step Solution

1. Step 1: Write the proportion equation
   83,443.68 : 115,091.28 = 60,789.60 : x
2. Step 2: Convert to fraction form
   83,443.68/115,091.28 = 60,789.60/x
3. Step 3: Cross multiply
   83,443.68x = 115,091.28 × 60,789.60
4. Step 4: Simplify right side
   83,443.68x = 6,996,352,874.69
5. Step 5: Solve for x
   x = 6,996,352,874.69/83,443.68
6. Step 6: Final answer
   x = 83,845.21