Finding the Fourth Proportional to 9,213.61, 12,714.78 and 5,021.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,213.61 : 12,714.78 = 5,021.86 : x
2. Step 2: Convert to fraction form
   9,213.61/12,714.78 = 5,021.86/x
3. Step 3: Cross multiply
   9,213.61x = 12,714.78 × 5,021.86
4. Step 4: Simplify right side
   9,213.61x = 63,851,855.98
5. Step 5: Solve for x
   x = 63,851,855.98/9,213.61
6. Step 6: Final answer
   x = 6,930.17