Finding the Fourth Proportional to 1,723.16, 2,378.01 and 977.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,723.16 : 2,378.01 = 977.15 : x
2. Step 2: Convert to fraction form
   1,723.16/2,378.01 = 977.15/x
3. Step 3: Cross multiply
   1,723.16x = 2,378.01 × 977.15
4. Step 4: Simplify right side
   1,723.16x = 2,323,667.75
5. Step 5: Solve for x
   x = 2,323,667.75/1,723.16
6. Step 6: Final answer
   x = 1,348.49