Finding the Fourth Proportional to 10,145.51, 14,018.69 and 7,807.85

Step by Step Solution

1. Step 1: Write the proportion equation
   10,145.51 : 14,018.69 = 7,807.85 : x
2. Step 2: Convert to fraction form
   10,145.51/14,018.69 = 7,807.85/x
3. Step 3: Cross multiply
   10,145.51x = 14,018.69 × 7,807.85
4. Step 4: Simplify right side
   10,145.51x = 109,455,786.79
5. Step 5: Solve for x
   x = 109,455,786.79/10,145.51
6. Step 6: Final answer
   x = 10,788.60