Finding the Fourth Proportional to 3,667.31, 5,499.80 and 1,326.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,667.31 : 5,499.80 = 1,326.99 : x
2. Step 2: Convert to fraction form
   3,667.31/5,499.80 = 1,326.99/x
3. Step 3: Cross multiply
   3,667.31x = 5,499.80 × 1,326.99
4. Step 4: Simplify right side
   3,667.31x = 7,298,172.97
5. Step 5: Solve for x
   x = 7,298,172.97/3,667.31
6. Step 6: Final answer
   x = 1,990.06