Finding the Fourth Proportional to 814,058.91, 1,221,146.69 and 215,014.10

Step by Step Solution

1. Step 1: Write the proportion equation
   814,058.91 : 1,221,146.69 = 215,014.10 : x
2. Step 2: Convert to fraction form
   814,058.91/1,221,146.69 = 215,014.10/x
3. Step 3: Cross multiply
   814,058.91x = 1,221,146.69 × 215,014.10
4. Step 4: Simplify right side
   814,058.91x = 262,563,749,337.53
5. Step 5: Solve for x
   x = 262,563,749,337.53/814,058.91
6. Step 6: Final answer
   x = 322,536.55