Finding the Fourth Proportional to 48,172.72, 72,258.86 and 13,112.28

Step by Step Solution

1. Step 1: Write the proportion equation
   48,172.72 : 72,258.86 = 13,112.28 : x
2. Step 2: Convert to fraction form
   48,172.72/72,258.86 = 13,112.28/x
3. Step 3: Cross multiply
   48,172.72x = 72,258.86 × 13,112.28
4. Step 4: Simplify right side
   48,172.72x = 947,478,404.80
5. Step 5: Solve for x
   x = 947,478,404.80/48,172.72
6. Step 6: Final answer
   x = 19,668.36