Finding the Fourth Proportional to 37,720.50, 52,048.50 and 21,801.88

Step by Step Solution

1. Step 1: Write the proportion equation
   37,720.50 : 52,048.50 = 21,801.88 : x
2. Step 2: Convert to fraction form
   37,720.50/52,048.50 = 21,801.88/x
3. Step 3: Cross multiply
   37,720.50x = 52,048.50 × 21,801.88
4. Step 4: Simplify right side
   37,720.50x = 1,134,755,151.18
5. Step 5: Solve for x
   x = 1,134,755,151.18/37,720.50
6. Step 6: Final answer
   x = 30,083.25