Finding the Fourth Proportional to 51,261.48, 70,743.30 and 28,905

Step by Step Solution

1. Step 1: Write the proportion equation
   51,261.48 : 70,743.30 = 28,905 : x
2. Step 2: Convert to fraction form
   51,261.48/70,743.30 = 28,905/x
3. Step 3: Cross multiply
   51,261.48x = 70,743.30 × 28,905
4. Step 4: Simplify right side
   51,261.48x = 2,044,835,086.50
5. Step 5: Solve for x
   x = 2,044,835,086.50/51,261.48
6. Step 6: Final answer
   x = 39,890.29