Finding the Fourth Proportional to 1,010,499.34, 1,394,490.33 and 557,790.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010,499.34 : 1,394,490.33 = 557,790.34 : x
2. Step 2: Convert to fraction form
   1,010,499.34/1,394,490.33 = 557,790.34/x
3. Step 3: Cross multiply
   1,010,499.34x = 1,394,490.33 × 557,790.34
4. Step 4: Simplify right side
   1,010,499.34x = 777,833,235,297.41
5. Step 5: Solve for x
   x = 777,833,235,297.41/1,010,499.34
6. Step 6: Final answer
   x = 769,751.35