Finding the Fourth Proportional to 1,158,665.70, 1,738,128.15 and 359,940.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158,665.70 : 1,738,128.15 = 359,940.90 : x
2. Step 2: Convert to fraction form
   1,158,665.70/1,738,128.15 = 359,940.90/x
3. Step 3: Cross multiply
   1,158,665.70x = 1,738,128.15 × 359,940.90
4. Step 4: Simplify right side
   1,158,665.70x = 625,623,410,626.34
5. Step 5: Solve for x
   x = 625,623,410,626.34/1,158,665.70
6. Step 6: Final answer
   x = 539,951.61