Finding the Fourth Proportional to 2,113.30, 2,916.34 and 1,181.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.30 : 2,916.34 = 1,181.80 : x
2. Step 2: Convert to fraction form
   2,113.30/2,916.34 = 1,181.80/x
3. Step 3: Cross multiply
   2,113.30x = 2,916.34 × 1,181.80
4. Step 4: Simplify right side
   2,113.30x = 3,446,530.61
5. Step 5: Solve for x
   x = 3,446,530.61/2,113.30
6. Step 6: Final answer
   x = 1,630.88