Finding the Fourth Proportional to 647,826.30, 970,500.15 and 348,207.30

Step by Step Solution

1. Step 1: Write the proportion equation
   647,826.30 : 970,500.15 = 348,207.30 : x
2. Step 2: Convert to fraction form
   647,826.30/970,500.15 = 348,207.30/x
3. Step 3: Cross multiply
   647,826.30x = 970,500.15 × 348,207.30
4. Step 4: Simplify right side
   647,826.30x = 337,935,236,881.10
5. Step 5: Solve for x
   x = 337,935,236,881.10/647,826.30
6. Step 6: Final answer
   x = 521,644.82