Finding the Fourth Proportional to 20,897.34, 28,851.84 and 12,948

Step by Step Solution

1. Step 1: Write the proportion equation
   20,897.34 : 28,851.84 = 12,948 : x
2. Step 2: Convert to fraction form
   20,897.34/28,851.84 = 12,948/x
3. Step 3: Cross multiply
   20,897.34x = 28,851.84 × 12,948
4. Step 4: Simplify right side
   20,897.34x = 373,573,624.32
5. Step 5: Solve for x
   x = 373,573,624.32/20,897.34
6. Step 6: Final answer
   x = 17,876.61