Finding the Fourth Proportional to 14,145.75, 19,521.15 and 7,858.71

Step by Step Solution

1. Step 1: Write the proportion equation
   14,145.75 : 19,521.15 = 7,858.71 : x
2. Step 2: Convert to fraction form
   14,145.75/19,521.15 = 7,858.71/x
3. Step 3: Cross multiply
   14,145.75x = 19,521.15 × 7,858.71
4. Step 4: Simplify right side
   14,145.75x = 153,411,056.72
5. Step 5: Solve for x
   x = 153,411,056.72/14,145.75
6. Step 6: Final answer
   x = 10,845.03