Finding the Fourth Proportional to 48,168.86, 72,245.99 and 13,111.25

Step by Step Solution

1. Step 1: Write the proportion equation
   48,168.86 : 72,245.99 = 13,111.25 : x
2. Step 2: Convert to fraction form
   48,168.86/72,245.99 = 13,111.25/x
3. Step 3: Cross multiply
   48,168.86x = 72,245.99 × 13,111.25
4. Step 4: Simplify right side
   48,168.86x = 947,234,809.60
5. Step 5: Solve for x
   x = 947,234,809.60/48,168.86
6. Step 6: Final answer
   x = 19,664.88