Finding the Fourth Proportional to 1,116.16, 1,680.82 and 973.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.16 : 1,680.82 = 973.60 : x
2. Step 2: Convert to fraction form
   1,116.16/1,680.82 = 973.60/x
3. Step 3: Cross multiply
   1,116.16x = 1,680.82 × 973.60
4. Step 4: Simplify right side
   1,116.16x = 1,636,446.35
5. Step 5: Solve for x
   x = 1,636,446.35/1,116.16
6. Step 6: Final answer
   x = 1,466.14