Finding the Fourth Proportional to 8,788.34, 12,129.27 and 5,011.51

Step by Step Solution

1. Step 1: Write the proportion equation
   8,788.34 : 12,129.27 = 5,011.51 : x
2. Step 2: Convert to fraction form
   8,788.34/12,129.27 = 5,011.51/x
3. Step 3: Cross multiply
   8,788.34x = 12,129.27 × 5,011.51
4. Step 4: Simplify right side
   8,788.34x = 60,785,957.90
5. Step 5: Solve for x
   x = 60,785,957.90/8,788.34
6. Step 6: Final answer
   x = 6,916.66