Finding the Fourth Proportional to 1,699.89, 2,346.17 and 991.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,699.89 : 2,346.17 = 991.90 : x
2. Step 2: Convert to fraction form
   1,699.89/2,346.17 = 991.90/x
3. Step 3: Cross multiply
   1,699.89x = 2,346.17 × 991.90
4. Step 4: Simplify right side
   1,699.89x = 2,327,150.80
5. Step 5: Solve for x
   x = 2,327,150.80/1,699.89
6. Step 6: Final answer
   x = 1,369.00