Finding the Fourth Proportional to 47,172.72, 65,071.32 and 29,478

Step by Step Solution

1. Step 1: Write the proportion equation
   47,172.72 : 65,071.32 = 29,478 : x
2. Step 2: Convert to fraction form
   47,172.72/65,071.32 = 29,478/x
3. Step 3: Cross multiply
   47,172.72x = 65,071.32 × 29,478
4. Step 4: Simplify right side
   47,172.72x = 1,918,172,370.96
5. Step 5: Solve for x
   x = 1,918,172,370.96/47,172.72
6. Step 6: Final answer
   x = 40,662.75