Finding the Fourth Proportional to 21,061.82, 29,066.84 and 12,112.13

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.82 : 29,066.84 = 12,112.13 : x
2. Step 2: Convert to fraction form
   21,061.82/29,066.84 = 12,112.13/x
3. Step 3: Cross multiply
   21,061.82x = 29,066.84 × 12,112.13
4. Step 4: Simplify right side
   21,061.82x = 352,061,344.77
5. Step 5: Solve for x
   x = 352,061,344.77/21,061.82
6. Step 6: Final answer
   x = 16,715.62