Finding the Fourth Proportional to 1,588.24, 2,191.78 and 925.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,588.24 : 2,191.78 = 925.55 : x
2. Step 2: Convert to fraction form
   1,588.24/2,191.78 = 925.55/x
3. Step 3: Cross multiply
   1,588.24x = 2,191.78 × 925.55
4. Step 4: Simplify right side
   1,588.24x = 2,028,601.98
5. Step 5: Solve for x
   x = 2,028,601.98/1,588.24
6. Step 6: Final answer
   x = 1,277.26