Finding the Fourth Proportional to 12,009.93, 16,572.60 and 7,761.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,009.93 : 16,572.60 = 7,761.12 : x
2. Step 2: Convert to fraction form
   12,009.93/16,572.60 = 7,761.12/x
3. Step 3: Cross multiply
   12,009.93x = 16,572.60 × 7,761.12
4. Step 4: Simplify right side
   12,009.93x = 128,621,937.31
5. Step 5: Solve for x
   x = 128,621,937.31/12,009.93
6. Step 6: Final answer
   x = 10,709.63