Finding the Fourth Proportional to 37,407.38, 51,622.18 and 20,640.38

Step by Step Solution

1. Step 1: Write the proportion equation
   37,407.38 : 51,622.18 = 20,640.38 : x
2. Step 2: Convert to fraction form
   37,407.38/51,622.18 = 20,640.38/x
3. Step 3: Cross multiply
   37,407.38x = 51,622.18 × 20,640.38
4. Step 4: Simplify right side
   37,407.38x = 1,065,501,411.63
5. Step 5: Solve for x
   x = 1,065,501,411.63/37,407.38
6. Step 6: Final answer
   x = 28,483.72