Finding the Fourth Proportional to 19,640,962.72, 27,105,373.24 and 10,939,139.20

Step by Step Solution

1. Step 1: Write the proportion equation
   19,640,962.72 : 27,105,373.24 = 10,939,139.20 : x
2. Step 2: Convert to fraction form
   19,640,962.72/27,105,373.24 = 10,939,139.20/x
3. Step 3: Cross multiply
   19,640,962.72x = 27,105,373.24 × 10,939,139.20
4. Step 4: Simplify right side
   19,640,962.72x = 296,509,450,940,315
5. Step 5: Solve for x
   x = 296,509,450,940,315/19,640,962.72
6. Step 6: Final answer
   x = 15,096,482.55