Finding the Fourth Proportional to 111,018.92, 166,238.53 and 72,948.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,018.92 : 166,238.53 = 72,948.50 : x
2. Step 2: Convert to fraction form
   111,018.92/166,238.53 = 72,948.50/x
3. Step 3: Cross multiply
   111,018.92x = 166,238.53 × 72,948.50
4. Step 4: Simplify right side
   111,018.92x = 12,126,850,392.14
5. Step 5: Solve for x
   x = 12,126,850,392.14/111,018.92
6. Step 6: Final answer
   x = 109,232.28