Finding the Fourth Proportional to 21,458.18, 29,613.94 and 13,507.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,458.18 : 29,613.94 = 13,507.22 : x
2. Step 2: Convert to fraction form
   21,458.18/29,613.94 = 13,507.22/x
3. Step 3: Cross multiply
   21,458.18x = 29,613.94 × 13,507.22
4. Step 4: Simplify right side
   21,458.18x = 400,002,002.65
5. Step 5: Solve for x
   x = 400,002,002.65/21,458.18
6. Step 6: Final answer
   x = 18,641.00