Finding the Fourth Proportional to 111,840.72, 154,289.33 and 66,492.98

Step by Step Solution

1. Step 1: Write the proportion equation
   111,840.72 : 154,289.33 = 66,492.98 : x
2. Step 2: Convert to fraction form
   111,840.72/154,289.33 = 66,492.98/x
3. Step 3: Cross multiply
   111,840.72x = 154,289.33 × 66,492.98
4. Step 4: Simplify right side
   111,840.72x = 10,259,157,333.90
5. Step 5: Solve for x
   x = 10,259,157,333.90/111,840.72
6. Step 6: Final answer
   x = 91,730.07