Finding the Fourth Proportional to 10,519.76, 15,784.29 and 5,588.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,519.76 : 15,784.29 = 5,588.21 : x
2. Step 2: Convert to fraction form
   10,519.76/15,784.29 = 5,588.21/x
3. Step 3: Cross multiply
   10,519.76x = 15,784.29 × 5,588.21
4. Step 4: Simplify right side
   10,519.76x = 88,205,848.30
5. Step 5: Solve for x
   x = 88,205,848.30/10,519.76
6. Step 6: Final answer
   x = 8,384.78