Finding the Fourth Proportional to 51,009,100.72, 76,513,995.60 and 18,647,690.56

Step by Step Solution

1. Step 1: Write the proportion equation
   51,009,100.72 : 76,513,995.60 = 18,647,690.56 : x
2. Step 2: Convert to fraction form
   51,009,100.72/76,513,995.60 = 18,647,690.56/x
3. Step 3: Cross multiply
   51,009,100.72x = 76,513,995.60 × 18,647,690.56
4. Step 4: Simplify right side
   51,009,100.72x = 1,426,809,313,458,001.25
5. Step 5: Solve for x
   x = 1,426,809,313,458,001.25/51,009,100.72
6. Step 6: Final answer
   x = 27,971,661.79