Finding the Fourth Proportional to 13,821.72, 19,073.91 and 7,852.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,821.72 : 19,073.91 = 7,852.20 : x
2. Step 2: Convert to fraction form
   13,821.72/19,073.91 = 7,852.20/x
3. Step 3: Cross multiply
   13,821.72x = 19,073.91 × 7,852.20
4. Step 4: Simplify right side
   13,821.72x = 149,772,156.10
5. Step 5: Solve for x
   x = 149,772,156.10/13,821.72
6. Step 6: Final answer
   x = 10,836.00