Finding the Fourth Proportional to 10,200.21, 15,267.48 and 5,263.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,200.21 : 15,267.48 = 5,263.05 : x
2. Step 2: Convert to fraction form
   10,200.21/15,267.48 = 5,263.05/x
3. Step 3: Cross multiply
   10,200.21x = 15,267.48 × 5,263.05
4. Step 4: Simplify right side
   10,200.21x = 80,353,510.61
5. Step 5: Solve for x
   x = 80,353,510.61/10,200.21
6. Step 6: Final answer
   x = 7,877.63