Finding the Fourth Proportional to 51,145.48, 70,580.56 and 28,484.72

Step by Step Solution

1. Step 1: Write the proportion equation
   51,145.48 : 70,580.56 = 28,484.72 : x
2. Step 2: Convert to fraction form
   51,145.48/70,580.56 = 28,484.72/x
3. Step 3: Cross multiply
   51,145.48x = 70,580.56 × 28,484.72
4. Step 4: Simplify right side
   51,145.48x = 2,010,467,489.04
5. Step 5: Solve for x
   x = 2,010,467,489.04/51,145.48
6. Step 6: Final answer
   x = 39,308.80