Finding the Fourth Proportional to 1,800.72, 2,699.64 and 774.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,800.72 : 2,699.64 = 774.16 : x
2. Step 2: Convert to fraction form
   1,800.72/2,699.64 = 774.16/x
3. Step 3: Cross multiply
   1,800.72x = 2,699.64 × 774.16
4. Step 4: Simplify right side
   1,800.72x = 2,089,953.30
5. Step 5: Solve for x
   x = 2,089,953.30/1,800.72
6. Step 6: Final answer
   x = 1,160.62