Finding the Fourth Proportional to 112,443.36, 168,820.56 and 57,078.24

Step by Step Solution

1. Step 1: Write the proportion equation
   112,443.36 : 168,820.56 = 57,078.24 : x
2. Step 2: Convert to fraction form
   112,443.36/168,820.56 = 57,078.24/x
3. Step 3: Cross multiply
   112,443.36x = 168,820.56 × 57,078.24
4. Step 4: Simplify right side
   112,443.36x = 9,635,980,440.61
5. Step 5: Solve for x
   x = 9,635,980,440.61/112,443.36
6. Step 6: Final answer
   x = 85,696.30