Finding the Fourth Proportional to 1,663.18, 2,294.52 and 1,191.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,663.18 : 2,294.52 = 1,191.10 : x
2. Step 2: Convert to fraction form
   1,663.18/2,294.52 = 1,191.10/x
3. Step 3: Cross multiply
   1,663.18x = 2,294.52 × 1,191.10
4. Step 4: Simplify right side
   1,663.18x = 2,733,002.77
5. Step 5: Solve for x
   x = 2,733,002.77/1,663.18
6. Step 6: Final answer
   x = 1,643.24