Finding the Fourth Proportional to 112,738.56, 155,540.61 and 64,305.69

Step by Step Solution

1. Step 1: Write the proportion equation
   112,738.56 : 155,540.61 = 64,305.69 : x
2. Step 2: Convert to fraction form
   112,738.56/155,540.61 = 64,305.69/x
3. Step 3: Cross multiply
   112,738.56x = 155,540.61 × 64,305.69
4. Step 4: Simplify right side
   112,738.56x = 10,002,146,249.07
5. Step 5: Solve for x
   x = 10,002,146,249.07/112,738.56
6. Step 6: Final answer
   x = 88,719.83