Finding the Fourth Proportional to 209,067.32, 288,513.15 and 113,574

Step by Step Solution

1. Step 1: Write the proportion equation
   209,067.32 : 288,513.15 = 113,574 : x
2. Step 2: Convert to fraction form
   209,067.32/288,513.15 = 113,574/x
3. Step 3: Cross multiply
   209,067.32x = 288,513.15 × 113,574
4. Step 4: Simplify right side
   209,067.32x = 32,767,592,498.10
5. Step 5: Solve for x
   x = 32,767,592,498.10/209,067.32
6. Step 6: Final answer
   x = 156,732.25