Finding the Fourth Proportional to 1,866.59, 2,801.61 and 942.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,866.59 : 2,801.61 = 942.79 : x
2. Step 2: Convert to fraction form
   1,866.59/2,801.61 = 942.79/x
3. Step 3: Cross multiply
   1,866.59x = 2,801.61 × 942.79
4. Step 4: Simplify right side
   1,866.59x = 2,641,342.61
5. Step 5: Solve for x
   x = 2,641,342.61/1,866.59
6. Step 6: Final answer
   x = 1,415.06