Finding the Fourth Proportional to 50,881.32, 70,212.42 and 28,521

Step by Step Solution

1. Step 1: Write the proportion equation
   50,881.32 : 70,212.42 = 28,521 : x
2. Step 2: Convert to fraction form
   50,881.32/70,212.42 = 28,521/x
3. Step 3: Cross multiply
   50,881.32x = 70,212.42 × 28,521
4. Step 4: Simplify right side
   50,881.32x = 2,002,528,430.82
5. Step 5: Solve for x
   x = 2,002,528,430.82/50,881.32
6. Step 6: Final answer
   x = 39,356.85