Finding the Fourth Proportional to 51,521.51, 71,098.89 and 28,861.31

Step by Step Solution

1. Step 1: Write the proportion equation
   51,521.51 : 71,098.89 = 28,861.31 : x
2. Step 2: Convert to fraction form
   51,521.51/71,098.89 = 28,861.31/x
3. Step 3: Cross multiply
   51,521.51x = 71,098.89 × 28,861.31
4. Step 4: Simplify right side
   51,521.51x = 2,052,007,104.95
5. Step 5: Solve for x
   x = 2,052,007,104.95/51,521.51
6. Step 6: Final answer
   x = 39,828.16