Finding the Fourth Proportional to 109,123.45, 150,504.81 and 74,688.59

Step by Step Solution

1. Step 1: Write the proportion equation
   109,123.45 : 150,504.81 = 74,688.59 : x
2. Step 2: Convert to fraction form
   109,123.45/150,504.81 = 74,688.59/x
3. Step 3: Cross multiply
   109,123.45x = 150,504.81 × 74,688.59
4. Step 4: Simplify right side
   109,123.45x = 11,240,992,047.12
5. Step 5: Solve for x
   x = 11,240,992,047.12/109,123.45
6. Step 6: Final answer
   x = 103,011.70