Finding the Fourth Proportional to 37,066.82, 51,139.55 and 21,139.79

Step by Step Solution

1. Step 1: Write the proportion equation
   37,066.82 : 51,139.55 = 21,139.79 : x
2. Step 2: Convert to fraction form
   37,066.82/51,139.55 = 21,139.79/x
3. Step 3: Cross multiply
   37,066.82x = 51,139.55 × 21,139.79
4. Step 4: Simplify right side
   37,066.82x = 1,081,079,144.85
5. Step 5: Solve for x
   x = 1,081,079,144.85/37,066.82
6. Step 6: Final answer
   x = 29,165.69