Finding the Fourth Proportional to 23,178,698.42, 31,986,524.78 and 12,724,454.48

Step by Step Solution

1. Step 1: Write the proportion equation
   23,178,698.42 : 31,986,524.78 = 12,724,454.48 : x
2. Step 2: Convert to fraction form
   23,178,698.42/31,986,524.78 = 12,724,454.48/x
3. Step 3: Cross multiply
   23,178,698.42x = 31,986,524.78 × 12,724,454.48
4. Step 4: Simplify right side
   23,178,698.42x = 407,011,078,312,947.06
5. Step 5: Solve for x
   x = 407,011,078,312,947.06/23,178,698.42
6. Step 6: Final answer
   x = 17,559,703.79