Finding the Fourth Proportional to 50,705.29, 69,979.17 and 30,572.47

Step by Step Solution

1. Step 1: Write the proportion equation
   50,705.29 : 69,979.17 = 30,572.47 : x
2. Step 2: Convert to fraction form
   50,705.29/69,979.17 = 30,572.47/x
3. Step 3: Cross multiply
   50,705.29x = 69,979.17 × 30,572.47
4. Step 4: Simplify right side
   50,705.29x = 2,139,436,075.45
5. Step 5: Solve for x
   x = 2,139,436,075.45/50,705.29
6. Step 6: Final answer
   x = 42,193.55