Finding the Fourth Proportional to 47,436.57, 70,990.43 and 28,705.32

Step by Step Solution

1. Step 1: Write the proportion equation
   47,436.57 : 70,990.43 = 28,705.32 : x
2. Step 2: Convert to fraction form
   47,436.57/70,990.43 = 28,705.32/x
3. Step 3: Cross multiply
   47,436.57x = 70,990.43 × 28,705.32
4. Step 4: Simplify right side
   47,436.57x = 2,037,802,866.56
5. Step 5: Solve for x
   x = 2,037,802,866.56/47,436.57
6. Step 6: Final answer
   x = 42,958.48