Finding the Fourth Proportional to 1,983.60, 2,971.35 and 1,116.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,983.60 : 2,971.35 = 1,116.09 : x
2. Step 2: Convert to fraction form
   1,983.60/2,971.35 = 1,116.09/x
3. Step 3: Cross multiply
   1,983.60x = 2,971.35 × 1,116.09
4. Step 4: Simplify right side
   1,983.60x = 3,316,294.02
5. Step 5: Solve for x
   x = 3,316,294.02/1,983.60
6. Step 6: Final answer
   x = 1,671.86