Finding the Fourth Proportional to 45,298.72, 67,970.63 and 20,356.57

Step by Step Solution

1. Step 1: Write the proportion equation
   45,298.72 : 67,970.63 = 20,356.57 : x
2. Step 2: Convert to fraction form
   45,298.72/67,970.63 = 20,356.57/x
3. Step 3: Cross multiply
   45,298.72x = 67,970.63 × 20,356.57
4. Step 4: Simplify right side
   45,298.72x = 1,383,648,887.54
5. Step 5: Solve for x
   x = 1,383,648,887.54/45,298.72
6. Step 6: Final answer
   x = 30,544.99