Finding the Fourth Proportional to 7,142.96, 10,691.99 and 4,908.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,142.96 : 10,691.99 = 4,908.72 : x
2. Step 2: Convert to fraction form
   7,142.96/10,691.99 = 4,908.72/x
3. Step 3: Cross multiply
   7,142.96x = 10,691.99 × 4,908.72
4. Step 4: Simplify right side
   7,142.96x = 52,483,985.15
5. Step 5: Solve for x
   x = 52,483,985.15/7,142.96
6. Step 6: Final answer
   x = 7,347.66