Finding the Fourth Proportional to 21,061.42, 29,066.45 and 12,566.14

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.42 : 29,066.45 = 12,566.14 : x
2. Step 2: Convert to fraction form
   21,061.42/29,066.45 = 12,566.14/x
3. Step 3: Cross multiply
   21,061.42x = 29,066.45 × 12,566.14
4. Step 4: Simplify right side
   21,061.42x = 365,252,944.51
5. Step 5: Solve for x
   x = 365,252,944.51/21,061.42
6. Step 6: Final answer
   x = 17,342.28