Finding the Fourth Proportional to 14,145.75, 19,521.77 and 7,858.13

Step by Step Solution

1. Step 1: Write the proportion equation
   14,145.75 : 19,521.77 = 7,858.13 : x
2. Step 2: Convert to fraction form
   14,145.75/19,521.77 = 7,858.13/x
3. Step 3: Cross multiply
   14,145.75x = 19,521.77 × 7,858.13
4. Step 4: Simplify right side
   14,145.75x = 153,404,469.59
5. Step 5: Solve for x
   x = 153,404,469.59/14,145.75
6. Step 6: Final answer
   x = 10,844.56