Finding the Fourth Proportional to 51,139.08, 70,570.02 and 28,479

Step by Step Solution

1. Step 1: Write the proportion equation
   51,139.08 : 70,570.02 = 28,479 : x
2. Step 2: Convert to fraction form
   51,139.08/70,570.02 = 28,479/x
3. Step 3: Cross multiply
   51,139.08x = 70,570.02 × 28,479
4. Step 4: Simplify right side
   51,139.08x = 2,009,763,599.58
5. Step 5: Solve for x
   x = 2,009,763,599.58/51,139.08
6. Step 6: Final answer
   x = 39,299.96