Finding the Fourth Proportional to 1,810.63, 2,714.55 and 770.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,810.63 : 2,714.55 = 770.05 : x
2. Step 2: Convert to fraction form
   1,810.63/2,714.55 = 770.05/x
3. Step 3: Cross multiply
   1,810.63x = 2,714.55 × 770.05
4. Step 4: Simplify right side
   1,810.63x = 2,090,339.23
5. Step 5: Solve for x
   x = 2,090,339.23/1,810.63
6. Step 6: Final answer
   x = 1,154.48