Finding the Fourth Proportional to 47,272.20, 65,223.86 and 30,485

Step by Step Solution

1. Step 1: Write the proportion equation
   47,272.20 : 65,223.86 = 30,485 : x
2. Step 2: Convert to fraction form
   47,272.20/65,223.86 = 30,485/x
3. Step 3: Cross multiply
   47,272.20x = 65,223.86 × 30,485
4. Step 4: Simplify right side
   47,272.20x = 1,988,349,372.10
5. Step 5: Solve for x
   x = 1,988,349,372.10/47,272.20
6. Step 6: Final answer
   x = 42,061.71