Finding the Fourth Proportional to 21,061.14, 29,051.10 and 13,499.67

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.14 : 29,051.10 = 13,499.67 : x
2. Step 2: Convert to fraction form
   21,061.14/29,051.10 = 13,499.67/x
3. Step 3: Cross multiply
   21,061.14x = 29,051.10 × 13,499.67
4. Step 4: Simplify right side
   21,061.14x = 392,180,263.14
5. Step 5: Solve for x
   x = 392,180,263.14/21,061.14
6. Step 6: Final answer
   x = 18,621.04