Finding the Fourth Proportional to 115,940,443.20, 162,555,499.20 and 115,940,443.20

Step by Step Solution

1. Step 1: Write the proportion equation
   115,940,443.20 : 162,555,499.20 = 115,940,443.20 : x
2. Step 2: Convert to fraction form
   115,940,443.20/162,555,499.20 = 115,940,443.20/x
3. Step 3: Cross multiply
   115,940,443.20x = 162,555,499.20 × 115,940,443.20
4. Step 4: Simplify right side
   115,940,443.20x = 18,846,756,621,845,244
5. Step 5: Solve for x
   x = 18,846,756,621,845,244/115,940,443.20
6. Step 6: Final answer
   x = 162,555,499.20