Finding the Fourth Proportional to 1,461.05, 2,190.15 and 670.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,461.05 : 2,190.15 = 670.31 : x
2. Step 2: Convert to fraction form
   1,461.05/2,190.15 = 670.31/x
3. Step 3: Cross multiply
   1,461.05x = 2,190.15 × 670.31
4. Step 4: Simplify right side
   1,461.05x = 1,468,068.50
5. Step 5: Solve for x
   x = 1,468,068.50/1,461.05
6. Step 6: Final answer
   x = 1,004.81