Finding the Fourth Proportional to 8,789.30, 12,128.84 and 4,810.58

Step by Step Solution

1. Step 1: Write the proportion equation
   8,789.30 : 12,128.84 = 4,810.58 : x
2. Step 2: Convert to fraction form
   8,789.30/12,128.84 = 4,810.58/x
3. Step 3: Cross multiply
   8,789.30x = 12,128.84 × 4,810.58
4. Step 4: Simplify right side
   8,789.30x = 58,346,670.43
5. Step 5: Solve for x
   x = 58,346,670.43/8,789.30
6. Step 6: Final answer
   x = 6,638.38