Finding the Fourth Proportional to 1,916.78, 2,645.00 and 1,077.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,916.78 : 2,645.00 = 1,077.62 : x
2. Step 2: Convert to fraction form
   1,916.78/2,645.00 = 1,077.62/x
3. Step 3: Cross multiply
   1,916.78x = 2,645.00 × 1,077.62
4. Step 4: Simplify right side
   1,916.78x = 2,850,286.29
5. Step 5: Solve for x
   x = 2,850,286.29/1,916.78
6. Step 6: Final answer
   x = 1,487.02