Finding the Fourth Proportional to 14,501.86, 21,749.79 and 5,142.18

Step by Step Solution

1. Step 1: Write the proportion equation
   14,501.86 : 21,749.79 = 5,142.18 : x
2. Step 2: Convert to fraction form
   14,501.86/21,749.79 = 5,142.18/x
3. Step 3: Cross multiply
   14,501.86x = 21,749.79 × 5,142.18
4. Step 4: Simplify right side
   14,501.86x = 111,841,421.52
5. Step 5: Solve for x
   x = 111,841,421.52/14,501.86
6. Step 6: Final answer
   x = 7,712.21