Finding the Fourth Proportional to 72,420.36, 99,944.33 and 54,483.32

Step by Step Solution

1. Step 1: Write the proportion equation
   72,420.36 : 99,944.33 = 54,483.32 : x
2. Step 2: Convert to fraction form
   72,420.36/99,944.33 = 54,483.32/x
3. Step 3: Cross multiply
   72,420.36x = 99,944.33 × 54,483.32
4. Step 4: Simplify right side
   72,420.36x = 5,445,298,141.44
5. Step 5: Solve for x
   x = 5,445,298,141.44/72,420.36
6. Step 6: Final answer
   x = 75,190.16