Finding the Fourth Proportional to 21,460.48, 29,622.72 and 13,516

Step by Step Solution

1. Step 1: Write the proportion equation
   21,460.48 : 29,622.72 = 13,516 : x
2. Step 2: Convert to fraction form
   21,460.48/29,622.72 = 13,516/x
3. Step 3: Cross multiply
   21,460.48x = 29,622.72 × 13,516
4. Step 4: Simplify right side
   21,460.48x = 400,380,683.52
5. Step 5: Solve for x
   x = 400,380,683.52/21,460.48
6. Step 6: Final answer
   x = 18,656.65