Finding the Fourth Proportional to 10,191.42, 15,274.17 and 4,647.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,191.42 : 15,274.17 = 4,647.78 : x
2. Step 2: Convert to fraction form
   10,191.42/15,274.17 = 4,647.78/x
3. Step 3: Cross multiply
   10,191.42x = 15,274.17 × 4,647.78
4. Step 4: Simplify right side
   10,191.42x = 70,990,981.84
5. Step 5: Solve for x
   x = 70,990,981.84/10,191.42
6. Step 6: Final answer
   x = 6,965.76