Finding the Fourth Proportional to 51,084.72, 70,490.72 and 28,418.36

Step by Step Solution

1. Step 1: Write the proportion equation
   51,084.72 : 70,490.72 = 28,418.36 : x
2. Step 2: Convert to fraction form
   51,084.72/70,490.72 = 28,418.36/x
3. Step 3: Cross multiply
   51,084.72x = 70,490.72 × 28,418.36
4. Step 4: Simplify right side
   51,084.72x = 2,003,230,376.21
5. Step 5: Solve for x
   x = 2,003,230,376.21/51,084.72
6. Step 6: Final answer
   x = 39,213.89