Finding the Fourth Proportional to 80,970, 111,753.72 and 47,436

Step by Step Solution

1. Step 1: Write the proportion equation
   80,970 : 111,753.72 = 47,436 : x
2. Step 2: Convert to fraction form
   80,970/111,753.72 = 47,436/x
3. Step 3: Cross multiply
   80,970x = 111,753.72 × 47,436
4. Step 4: Simplify right side
   80,970x = 5,301,149,461.92
5. Step 5: Solve for x
   x = 5,301,149,461.92/80,970
6. Step 6: Final answer
   x = 65,470.54