Finding the Fourth Proportional to 37,618.98, 51,911.33 and 20,620.50

Step by Step Solution

1. Step 1: Write the proportion equation
   37,618.98 : 51,911.33 = 20,620.50 : x
2. Step 2: Convert to fraction form
   37,618.98/51,911.33 = 20,620.50/x
3. Step 3: Cross multiply
   37,618.98x = 51,911.33 × 20,620.50
4. Step 4: Simplify right side
   37,618.98x = 1,070,437,580.27
5. Step 5: Solve for x
   x = 1,070,437,580.27/37,618.98
6. Step 6: Final answer
   x = 28,454.72