Finding the Fourth Proportional to 112,128.16, 154,759.28 and 64,414.24

Step by Step Solution

1. Step 1: Write the proportion equation
   112,128.16 : 154,759.28 = 64,414.24 : x
2. Step 2: Convert to fraction form
   112,128.16/154,759.28 = 64,414.24/x
3. Step 3: Cross multiply
   112,128.16x = 154,759.28 × 64,414.24
4. Step 4: Simplify right side
   112,128.16x = 9,968,701,404.15
5. Step 5: Solve for x
   x = 9,968,701,404.15/112,128.16
6. Step 6: Final answer
   x = 88,904.53