Finding the Fourth Proportional to 1,672.98, 2,307.18 and 1,105.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.98 : 2,307.18 = 1,105.57 : x
2. Step 2: Convert to fraction form
   1,672.98/2,307.18 = 1,105.57/x
3. Step 3: Cross multiply
   1,672.98x = 2,307.18 × 1,105.57
4. Step 4: Simplify right side
   1,672.98x = 2,550,748.99
5. Step 5: Solve for x
   x = 2,550,748.99/1,672.98
6. Step 6: Final answer
   x = 1,524.67