Finding the Fourth Proportional to 1,167.69, 1,611.36 and 670.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,167.69 : 1,611.36 = 670.31 : x
2. Step 2: Convert to fraction form
   1,167.69/1,611.36 = 670.31/x
3. Step 3: Cross multiply
   1,167.69x = 1,611.36 × 670.31
4. Step 4: Simplify right side
   1,167.69x = 1,080,108.71
5. Step 5: Solve for x
   x = 1,080,108.71/1,167.69
6. Step 6: Final answer
   x = 924.99