Finding the Fourth Proportional to 1,245,863.50, 1,869,107.37 and 359,399.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,245,863.50 : 1,869,107.37 = 359,399.50 : x
2. Step 2: Convert to fraction form
   1,245,863.50/1,869,107.37 = 359,399.50/x
3. Step 3: Cross multiply
   1,245,863.50x = 1,869,107.37 × 359,399.50
4. Step 4: Simplify right side
   1,245,863.50x = 671,756,254,224.32
5. Step 5: Solve for x
   x = 671,756,254,224.32/1,245,863.50
6. Step 6: Final answer
   x = 539,189.29