Finding the Fourth Proportional to 109,054.89, 150,503.67 and 66,621.42

Step by Step Solution

1. Step 1: Write the proportion equation
   109,054.89 : 150,503.67 = 66,621.42 : x
2. Step 2: Convert to fraction form
   109,054.89/150,503.67 = 66,621.42/x
3. Step 3: Cross multiply
   109,054.89x = 150,503.67 × 66,621.42
4. Step 4: Simplify right side
   109,054.89x = 10,026,768,210.61
5. Step 5: Solve for x
   x = 10,026,768,210.61/109,054.89
6. Step 6: Final answer
   x = 91,942.40