Finding the Fourth Proportional to 1,084.21, 1,495.71 and 690.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.21 : 1,495.71 = 690.99 : x
2. Step 2: Convert to fraction form
   1,084.21/1,495.71 = 690.99/x
3. Step 3: Cross multiply
   1,084.21x = 1,495.71 × 690.99
4. Step 4: Simplify right side
   1,084.21x = 1,033,517.64
5. Step 5: Solve for x
   x = 1,033,517.64/1,084.21
6. Step 6: Final answer
   x = 953.25