Finding the Fourth Proportional to 51,196.32, 70,642.80 and 28,836

Step by Step Solution

1. Step 1: Write the proportion equation
   51,196.32 : 70,642.80 = 28,836 : x
2. Step 2: Convert to fraction form
   51,196.32/70,642.80 = 28,836/x
3. Step 3: Cross multiply
   51,196.32x = 70,642.80 × 28,836
4. Step 4: Simplify right side
   51,196.32x = 2,037,055,780.80
5. Step 5: Solve for x
   x = 2,037,055,780.80/51,196.32
6. Step 6: Final answer
   x = 39,789.11