Finding the Fourth Proportional to 790,216.50, 1,090,498.71 and 427,640.37

Step by Step Solution

1. Step 1: Write the proportion equation
   790,216.50 : 1,090,498.71 = 427,640.37 : x
2. Step 2: Convert to fraction form
   790,216.50/1,090,498.71 = 427,640.37/x
3. Step 3: Cross multiply
   790,216.50x = 1,090,498.71 × 427,640.37
4. Step 4: Simplify right side
   790,216.50x = 466,341,271,828.92
5. Step 5: Solve for x
   x = 466,341,271,828.92/790,216.50
6. Step 6: Final answer
   x = 590,143.68