Finding the Fourth Proportional to 760,218.39, 1,139,417.52 and 354,865.23

Step by Step Solution

1. Step 1: Write the proportion equation
   760,218.39 : 1,139,417.52 = 354,865.23 : x
2. Step 2: Convert to fraction form
   760,218.39/1,139,417.52 = 354,865.23/x
3. Step 3: Cross multiply
   760,218.39x = 1,139,417.52 × 354,865.23
4. Step 4: Simplify right side
   760,218.39x = 404,339,660,300.83
5. Step 5: Solve for x
   x = 404,339,660,300.83/760,218.39
6. Step 6: Final answer
   x = 531,873.03