Finding the Fourth Proportional to 1,605.45, 2,215.00 and 942.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.45 : 2,215.00 = 942.47 : x
2. Step 2: Convert to fraction form
   1,605.45/2,215.00 = 942.47/x
3. Step 3: Cross multiply
   1,605.45x = 2,215.00 × 942.47
4. Step 4: Simplify right side
   1,605.45x = 2,087,561.15
5. Step 5: Solve for x
   x = 2,087,561.15/1,605.45
6. Step 6: Final answer
   x = 1,300.30