Finding the Fourth Proportional to 1,123,359.93, 1,549,858.19 and 639,582.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,359.93 : 1,549,858.19 = 639,582.78 : x
2. Step 2: Convert to fraction form
   1,123,359.93/1,549,858.19 = 639,582.78/x
3. Step 3: Cross multiply
   1,123,359.93x = 1,549,858.19 × 639,582.78
4. Step 4: Simplify right side
   1,123,359.93x = 991,262,606,568.05
5. Step 5: Solve for x
   x = 991,262,606,568.05/1,123,359.93
6. Step 6: Final answer
   x = 882,408.73