Finding the Fourth Proportional to 1,158,613.82, 1,598,981.31 and 642,418.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158,613.82 : 1,598,981.31 = 642,418.95 : x
2. Step 2: Convert to fraction form
   1,158,613.82/1,598,981.31 = 642,418.95/x
3. Step 3: Cross multiply
   1,158,613.82x = 1,598,981.31 × 642,418.95
4. Step 4: Simplify right side
   1,158,613.82x = 1,027,215,891,241.73
5. Step 5: Solve for x
   x = 1,027,215,891,241.73/1,158,613.82
6. Step 6: Final answer
   x = 886,590.40