Finding the Fourth Proportional to 1,078.07, 1,487.90 and 606.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.07 : 1,487.90 = 606.15 : x
2. Step 2: Convert to fraction form
   1,078.07/1,487.90 = 606.15/x
3. Step 3: Cross multiply
   1,078.07x = 1,487.90 × 606.15
4. Step 4: Simplify right side
   1,078.07x = 901,890.59
5. Step 5: Solve for x
   x = 901,890.59/1,078.07
6. Step 6: Final answer
   x = 836.58