Finding the Fourth Proportional to 9,490.04, 14,239.92 and 5,111.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,490.04 : 14,239.92 = 5,111.72 : x
2. Step 2: Convert to fraction form
   9,490.04/14,239.92 = 5,111.72/x
3. Step 3: Cross multiply
   9,490.04x = 14,239.92 × 5,111.72
4. Step 4: Simplify right side
   9,490.04x = 72,790,483.86
5. Step 5: Solve for x
   x = 72,790,483.86/9,490.04
6. Step 6: Final answer
   x = 7,670.20