Finding the Fourth Proportional to 2,147.52, 3,218.78 and 975.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.52 : 3,218.78 = 975.77 : x
2. Step 2: Convert to fraction form
   2,147.52/3,218.78 = 975.77/x
3. Step 3: Cross multiply
   2,147.52x = 3,218.78 × 975.77
4. Step 4: Simplify right side
   2,147.52x = 3,140,767.99
5. Step 5: Solve for x
   x = 3,140,767.99/2,147.52
6. Step 6: Final answer
   x = 1,462.51