Finding the Fourth Proportional to 10,620, 15,935.76 and 5,148

Step by Step Solution

1. Step 1: Write the proportion equation
   10,620 : 15,935.76 = 5,148 : x
2. Step 2: Convert to fraction form
   10,620/15,935.76 = 5,148/x
3. Step 3: Cross multiply
   10,620x = 15,935.76 × 5,148
4. Step 4: Simplify right side
   10,620x = 82,037,292.48
5. Step 5: Solve for x
   x = 82,037,292.48/10,620
6. Step 6: Final answer
   x = 7,724.79