Finding the Fourth Proportional to 51,061.29, 70,464.63 and 28,399.74

Step by Step Solution

1. Step 1: Write the proportion equation
   51,061.29 : 70,464.63 = 28,399.74 : x
2. Step 2: Convert to fraction form
   51,061.29/70,464.63 = 28,399.74/x
3. Step 3: Cross multiply
   51,061.29x = 70,464.63 × 28,399.74
4. Step 4: Simplify right side
   51,061.29x = 2,001,176,818.87
5. Step 5: Solve for x
   x = 2,001,176,818.87/51,061.29
6. Step 6: Final answer
   x = 39,191.67