Finding the Fourth Proportional to 9,720.30, 14,587.54 and 3,878.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,720.30 : 14,587.54 = 3,878.58 : x
2. Step 2: Convert to fraction form
   9,720.30/14,587.54 = 3,878.58/x
3. Step 3: Cross multiply
   9,720.30x = 14,587.54 × 3,878.58
4. Step 4: Simplify right side
   9,720.30x = 56,578,940.89
5. Step 5: Solve for x
   x = 56,578,940.89/9,720.30
6. Step 6: Final answer
   x = 5,820.70