Finding the Fourth Proportional to 25,931.58, 38,860.56 and 19,986

Step by Step Solution

1. Step 1: Write the proportion equation
   25,931.58 : 38,860.56 = 19,986 : x
2. Step 2: Convert to fraction form
   25,931.58/38,860.56 = 19,986/x
3. Step 3: Cross multiply
   25,931.58x = 38,860.56 × 19,986
4. Step 4: Simplify right side
   25,931.58x = 776,667,152.16
5. Step 5: Solve for x
   x = 776,667,152.16/25,931.58
6. Step 6: Final answer
   x = 29,950.63