Finding the Fourth Proportional to 51,443.01, 70,994.12 and 28,780.65

Step by Step Solution

1. Step 1: Write the proportion equation
   51,443.01 : 70,994.12 = 28,780.65 : x
2. Step 2: Convert to fraction form
   51,443.01/70,994.12 = 28,780.65/x
3. Step 3: Cross multiply
   51,443.01x = 70,994.12 × 28,780.65
4. Step 4: Simplify right side
   51,443.01x = 2,043,256,919.78
5. Step 5: Solve for x
   x = 2,043,256,919.78/51,443.01
6. Step 6: Final answer
   x = 39,718.84