Finding the Fourth Proportional to 1,162,288.37, 1,603,987.59 and 638,992.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162,288.37 : 1,603,987.59 = 638,992.57 : x
2. Step 2: Convert to fraction form
   1,162,288.37/1,603,987.59 = 638,992.57/x
3. Step 3: Cross multiply
   1,162,288.37x = 1,603,987.59 × 638,992.57
4. Step 4: Simplify right side
   1,162,288.37x = 1,024,936,152,382.21
5. Step 5: Solve for x
   x = 1,024,936,152,382.21/1,162,288.37
6. Step 6: Final answer
   x = 881,826.04