Finding the Fourth Proportional to 20,923,749.50, 31,385,943.99 and 7,970,619.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,923,749.50 : 31,385,943.99 = 7,970,619.31 : x
2. Step 2: Convert to fraction form
   20,923,749.50/31,385,943.99 = 7,970,619.31/x
3. Step 3: Cross multiply
   20,923,749.50x = 31,385,943.99 × 7,970,619.31
4. Step 4: Simplify right side
   20,923,749.50x = 250,165,411,150,807.56
5. Step 5: Solve for x
   x = 250,165,411,150,807.56/20,923,749.50
6. Step 6: Final answer
   x = 11,956,050.76