Finding the Fourth Proportional to 13,662.18, 20,499.90 and 4,897.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,662.18 : 20,499.90 = 4,897.74 : x
2. Step 2: Convert to fraction form
   13,662.18/20,499.90 = 4,897.74/x
3. Step 3: Cross multiply
   13,662.18x = 20,499.90 × 4,897.74
4. Step 4: Simplify right side
   13,662.18x = 100,403,180.23
5. Step 5: Solve for x
   x = 100,403,180.23/13,662.18
6. Step 6: Final answer
   x = 7,348.99