Finding the Fourth Proportional to 112,128.16, 154,729.76 and 64,347.92

Step by Step Solution

1. Step 1: Write the proportion equation
   112,128.16 : 154,729.76 = 64,347.92 : x
2. Step 2: Convert to fraction form
   112,128.16/154,729.76 = 64,347.92/x
3. Step 3: Cross multiply
   112,128.16x = 154,729.76 × 64,347.92
4. Step 4: Simplify right side
   112,128.16x = 9,956,538,218.10
5. Step 5: Solve for x
   x = 9,956,538,218.10/112,128.16
6. Step 6: Final answer
   x = 88,796.05