Finding the Fourth Proportional to 20,630,663.15, 28,469,155.59 and 12,366,590.36

Step by Step Solution

1. Step 1: Write the proportion equation
   20,630,663.15 : 28,469,155.59 = 12,366,590.36 : x
2. Step 2: Convert to fraction form
   20,630,663.15/28,469,155.59 = 12,366,590.36/x
3. Step 3: Cross multiply
   20,630,663.15x = 28,469,155.59 × 12,366,590.36
4. Step 4: Simplify right side
   20,630,663.15x = 352,066,384,934,288.38
5. Step 5: Solve for x
   x = 352,066,384,934,288.38/20,630,663.15
6. Step 6: Final answer
   x = 17,065,199.62