Finding the Fourth Proportional to 375,996, 518,920.56 and 217,020

Step by Step Solution

1. Step 1: Write the proportion equation
   375,996 : 518,920.56 = 217,020 : x
2. Step 2: Convert to fraction form
   375,996/518,920.56 = 217,020/x
3. Step 3: Cross multiply
   375,996x = 518,920.56 × 217,020
4. Step 4: Simplify right side
   375,996x = 112,616,139,931.20
5. Step 5: Solve for x
   x = 112,616,139,931.20/375,996
6. Step 6: Final answer
   x = 299,514.20