Finding the Fourth Proportional to 14,145.78, 19,521.18 and 7,858.16

Step by Step Solution

1. Step 1: Write the proportion equation
   14,145.78 : 19,521.18 = 7,858.16 : x
2. Step 2: Convert to fraction form
   14,145.78/19,521.18 = 7,858.16/x
3. Step 3: Cross multiply
   14,145.78x = 19,521.18 × 7,858.16
4. Step 4: Simplify right side
   14,145.78x = 153,400,458.22
5. Step 5: Solve for x
   x = 153,400,458.22/14,145.78
6. Step 6: Final answer
   x = 10,844.26