Finding the Fourth Proportional to 1,603.72, 2,213.15 and 940.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,603.72 : 2,213.15 = 940.59 : x
2. Step 2: Convert to fraction form
   1,603.72/2,213.15 = 940.59/x
3. Step 3: Cross multiply
   1,603.72x = 2,213.15 × 940.59
4. Step 4: Simplify right side
   1,603.72x = 2,081,666.76
5. Step 5: Solve for x
   x = 2,081,666.76/1,603.72
6. Step 6: Final answer
   x = 1,298.02