Finding the Fourth Proportional to 1,906.76, 2,631.60 and 1,161.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,906.76 : 2,631.60 = 1,161.15 : x
2. Step 2: Convert to fraction form
   1,906.76/2,631.60 = 1,161.15/x
3. Step 3: Cross multiply
   1,906.76x = 2,631.60 × 1,161.15
4. Step 4: Simplify right side
   1,906.76x = 3,055,682.34
5. Step 5: Solve for x
   x = 3,055,682.34/1,906.76
6. Step 6: Final answer
   x = 1,602.56