Finding the Fourth Proportional to 1,605.80, 2,215.10 and 942.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.80 : 2,215.10 = 942.53 : x
2. Step 2: Convert to fraction form
   1,605.80/2,215.10 = 942.53/x
3. Step 3: Cross multiply
   1,605.80x = 2,215.10 × 942.53
4. Step 4: Simplify right side
   1,605.80x = 2,087,784.77
5. Step 5: Solve for x
   x = 2,087,784.77/1,605.80
6. Step 6: Final answer
   x = 1,300.15