Finding the Fourth Proportional to 1,223,930.82, 1,687,505.82 and 815,136.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,223,930.82 : 1,687,505.82 = 815,136.42 : x
2. Step 2: Convert to fraction form
   1,223,930.82/1,687,505.82 = 815,136.42/x
3. Step 3: Cross multiply
   1,223,930.82x = 1,687,505.82 × 815,136.42
4. Step 4: Simplify right side
   1,223,930.82x = 1,375,547,452,843.96
5. Step 5: Solve for x
   x = 1,375,547,452,843.96/1,223,930.82
6. Step 6: Final answer
   x = 1,123,876.80