Finding the Fourth Proportional to 1,141,826.37, 1,575,721.61 and 618,538.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141,826.37 : 1,575,721.61 = 618,538.20 : x
2. Step 2: Convert to fraction form
   1,141,826.37/1,575,721.61 = 618,538.20/x
3. Step 3: Cross multiply
   1,141,826.37x = 1,575,721.61 × 618,538.20
4. Step 4: Simplify right side
   1,141,826.37x = 974,644,008,350.50
5. Step 5: Solve for x
   x = 974,644,008,350.50/1,141,826.37
6. Step 6: Final answer
   x = 853,583.38