Finding the Fourth Proportional to 1,690.69, 2,334.82 and 1,101.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,690.69 : 2,334.82 = 1,101.57 : x
2. Step 2: Convert to fraction form
   1,690.69/2,334.82 = 1,101.57/x
3. Step 3: Cross multiply
   1,690.69x = 2,334.82 × 1,101.57
4. Step 4: Simplify right side
   1,690.69x = 2,571,967.67
5. Step 5: Solve for x
   x = 2,571,967.67/1,690.69
6. Step 6: Final answer
   x = 1,521.25