Finding the Fourth Proportional to 1,911.32, 2,638.12 and 1,165.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,911.32 : 2,638.12 = 1,165.76 : x
2. Step 2: Convert to fraction form
   1,911.32/2,638.12 = 1,165.76/x
3. Step 3: Cross multiply
   1,911.32x = 2,638.12 × 1,165.76
4. Step 4: Simplify right side
   1,911.32x = 3,075,414.77
5. Step 5: Solve for x
   x = 3,075,414.77/1,911.32
6. Step 6: Final answer
   x = 1,609.05