Finding the Fourth Proportional to 384,149.55, 530,155.76 and 212,100.69

Step by Step Solution

1. Step 1: Write the proportion equation
   384,149.55 : 530,155.76 = 212,100.69 : x
2. Step 2: Convert to fraction form
   384,149.55/530,155.76 = 212,100.69/x
3. Step 3: Cross multiply
   384,149.55x = 530,155.76 × 212,100.69
4. Step 4: Simplify right side
   384,149.55x = 112,446,401,442.97
5. Step 5: Solve for x
   x = 112,446,401,442.97/384,149.55
6. Step 6: Final answer
   x = 292,715.17