Finding the Fourth Proportional to 2,612.12, 3,910.86 and 1,916.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.12 : 3,910.86 = 1,916.60 : x
2. Step 2: Convert to fraction form
   2,612.12/3,910.86 = 1,916.60/x
3. Step 3: Cross multiply
   2,612.12x = 3,910.86 × 1,916.60
4. Step 4: Simplify right side
   2,612.12x = 7,495,554.28
5. Step 5: Solve for x
   x = 7,495,554.28/2,612.12
6. Step 6: Final answer
   x = 2,869.53