Finding the Fourth Proportional to 37,630.48, 51,931.76 and 21,499.20

Step by Step Solution

1. Step 1: Write the proportion equation
   37,630.48 : 51,931.76 = 21,499.20 : x
2. Step 2: Convert to fraction form
   37,630.48/51,931.76 = 21,499.20/x
3. Step 3: Cross multiply
   37,630.48x = 51,931.76 × 21,499.20
4. Step 4: Simplify right side
   37,630.48x = 1,116,491,294.59
5. Step 5: Solve for x
   x = 1,116,491,294.59/37,630.48
6. Step 6: Final answer
   x = 29,669.87