Finding the Fourth Proportional to 112,321.56, 154,938.78 and 72,577.56

Step by Step Solution

1. Step 1: Write the proportion equation
   112,321.56 : 154,938.78 = 72,577.56 : x
2. Step 2: Convert to fraction form
   112,321.56/154,938.78 = 72,577.56/x
3. Step 3: Cross multiply
   112,321.56x = 154,938.78 × 72,577.56
4. Step 4: Simplify right side
   112,321.56x = 11,245,078,601.78
5. Step 5: Solve for x
   x = 11,245,078,601.78/112,321.56
6. Step 6: Final answer
   x = 100,115.05