Finding the Fourth Proportional to 51,221,105.42, 76,831,789.34 and 20,928,968.42

Step by Step Solution

1. Step 1: Write the proportion equation
   51,221,105.42 : 76,831,789.34 = 20,928,968.42 : x
2. Step 2: Convert to fraction form
   51,221,105.42/76,831,789.34 = 20,928,968.42/x
3. Step 3: Cross multiply
   51,221,105.42x = 76,831,789.34 × 20,928,968.42
4. Step 4: Simplify right side
   51,221,105.42x = 1,608,010,092,748,952.75
5. Step 5: Solve for x
   x = 1,608,010,092,748,952.75/51,221,105.42
6. Step 6: Final answer
   x = 31,393,506.24