Finding the Fourth Proportional to 1,577.72, 2,177.33 and 914.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,577.72 : 2,177.33 = 914.78 : x
2. Step 2: Convert to fraction form
   1,577.72/2,177.33 = 914.78/x
3. Step 3: Cross multiply
   1,577.72x = 2,177.33 × 914.78
4. Step 4: Simplify right side
   1,577.72x = 1,991,778.15
5. Step 5: Solve for x
   x = 1,991,778.15/1,577.72
6. Step 6: Final answer
   x = 1,262.44