Finding the Fourth Proportional to 12,888.72, 17,783.20 and 7,582.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,888.72 : 17,783.20 = 7,582.51 : x
2. Step 2: Convert to fraction form
   12,888.72/17,783.20 = 7,582.51/x
3. Step 3: Cross multiply
   12,888.72x = 17,783.20 × 7,582.51
4. Step 4: Simplify right side
   12,888.72x = 134,841,280.89
5. Step 5: Solve for x
   x = 134,841,280.89/12,888.72
6. Step 6: Final answer
   x = 10,461.96