Finding the Fourth Proportional to 219,120.72, 328,615.20 and 113,882.16

Step by Step Solution

1. Step 1: Write the proportion equation
   219,120.72 : 328,615.20 = 113,882.16 : x
2. Step 2: Convert to fraction form
   219,120.72/328,615.20 = 113,882.16/x
3. Step 3: Cross multiply
   219,120.72x = 328,615.20 × 113,882.16
4. Step 4: Simplify right side
   219,120.72x = 37,423,408,784.83
5. Step 5: Solve for x
   x = 37,423,408,784.83/219,120.72
6. Step 6: Final answer
   x = 170,789.00