Finding the Fourth Proportional to 113,521.32, 170,019.54 and 109,584.72

Step by Step Solution

1. Step 1: Write the proportion equation
   113,521.32 : 170,019.54 = 109,584.72 : x
2. Step 2: Convert to fraction form
   113,521.32/170,019.54 = 109,584.72/x
3. Step 3: Cross multiply
   113,521.32x = 170,019.54 × 109,584.72
4. Step 4: Simplify right side
   113,521.32x = 18,631,543,685.43
5. Step 5: Solve for x
   x = 18,631,543,685.43/113,521.32
6. Step 6: Final answer
   x = 164,123.74