Finding the Fourth Proportional to 12,420.48, 17,141.52 and 7,116

Step by Step Solution

1. Step 1: Write the proportion equation
   12,420.48 : 17,141.52 = 7,116 : x
2. Step 2: Convert to fraction form
   12,420.48/17,141.52 = 7,116/x
3. Step 3: Cross multiply
   12,420.48x = 17,141.52 × 7,116
4. Step 4: Simplify right side
   12,420.48x = 121,979,056.32
5. Step 5: Solve for x
   x = 121,979,056.32/12,420.48
6. Step 6: Final answer
   x = 9,820.80