Finding the Fourth Proportional to 120,618.51, 166,344.60 and 75,300.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,618.51 : 166,344.60 = 75,300.72 : x
2. Step 2: Convert to fraction form
   120,618.51/166,344.60 = 75,300.72/x
3. Step 3: Cross multiply
   120,618.51x = 166,344.60 × 75,300.72
4. Step 4: Simplify right side
   120,618.51x = 12,525,868,148.11
5. Step 5: Solve for x
   x = 12,525,868,148.11/120,618.51
6. Step 6: Final answer
   x = 103,846.98