Finding the Fourth Proportional to 1,605.84, 2,404.35 and 1,111.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.84 : 2,404.35 = 1,111.20 : x
2. Step 2: Convert to fraction form
   1,605.84/2,404.35 = 1,111.20/x
3. Step 3: Cross multiply
   1,605.84x = 2,404.35 × 1,111.20
4. Step 4: Simplify right side
   1,605.84x = 2,671,713.72
5. Step 5: Solve for x
   x = 2,671,713.72/1,605.84
6. Step 6: Final answer
   x = 1,663.75