Finding the Fourth Proportional to 109,274.30, 150,804.15 and 66,819.50

Step by Step Solution

1. Step 1: Write the proportion equation
   109,274.30 : 150,804.15 = 66,819.50 : x
2. Step 2: Convert to fraction form
   109,274.30/150,804.15 = 66,819.50/x
3. Step 3: Cross multiply
   109,274.30x = 150,804.15 × 66,819.50
4. Step 4: Simplify right side
   109,274.30x = 10,076,657,900.93
5. Step 5: Solve for x
   x = 10,076,657,900.93/109,274.30
6. Step 6: Final answer
   x = 92,214.34