Finding the Fourth Proportional to 375,836.72, 518,658.72 and 214,713.20

Step by Step Solution

1. Step 1: Write the proportion equation
   375,836.72 : 518,658.72 = 214,713.20 : x
2. Step 2: Convert to fraction form
   375,836.72/518,658.72 = 214,713.20/x
3. Step 3: Cross multiply
   375,836.72x = 518,658.72 × 214,713.20
4. Step 4: Simplify right side
   375,836.72x = 111,362,873,479.10
5. Step 5: Solve for x
   x = 111,362,873,479.10/375,836.72
6. Step 6: Final answer
   x = 296,306.53