Finding the Fourth Proportional to 1,040,143.30, 1,557,590.55 and 830,191.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040,143.30 : 1,557,590.55 = 830,191.30 : x
2. Step 2: Convert to fraction form
   1,040,143.30/1,557,590.55 = 830,191.30/x
3. Step 3: Cross multiply
   1,040,143.30x = 1,557,590.55 × 830,191.30
4. Step 4: Simplify right side
   1,040,143.30x = 1,293,098,123,572.22
5. Step 5: Solve for x
   x = 1,293,098,123,572.22/1,040,143.30
6. Step 6: Final answer
   x = 1,243,192.28