Finding the Fourth Proportional to 1,690.86, 2,333.23 and 992.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,690.86 : 2,333.23 = 992.10 : x
2. Step 2: Convert to fraction form
   1,690.86/2,333.23 = 992.10/x
3. Step 3: Cross multiply
   1,690.86x = 2,333.23 × 992.10
4. Step 4: Simplify right side
   1,690.86x = 2,314,792.52
5. Step 5: Solve for x
   x = 2,314,792.52/1,690.86
6. Step 6: Final answer
   x = 1,369.00