Finding the Fourth Proportional to 12,660,799.76, 18,969,562.92 and 9,048,109.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,660,799.76 : 18,969,562.92 = 9,048,109.04 : x
2. Step 2: Convert to fraction form
   12,660,799.76/18,969,562.92 = 9,048,109.04/x
3. Step 3: Cross multiply
   12,660,799.76x = 18,969,562.92 × 9,048,109.04
4. Step 4: Simplify right side
   12,660,799.76x = 171,638,673,741,300.78
5. Step 5: Solve for x
   x = 171,638,673,741,300.78/12,660,799.76
6. Step 6: Final answer
   x = 13,556,700.76