Finding the Fourth Proportional to 120,488.78, 166,281.86 and 69,500.57

Step by Step Solution

1. Step 1: Write the proportion equation
   120,488.78 : 166,281.86 = 69,500.57 : x
2. Step 2: Convert to fraction form
   120,488.78/166,281.86 = 69,500.57/x
3. Step 3: Cross multiply
   120,488.78x = 166,281.86 × 69,500.57
4. Step 4: Simplify right side
   120,488.78x = 11,556,683,393.00
5. Step 5: Solve for x
   x = 11,556,683,393.00/120,488.78
6. Step 6: Final answer
   x = 95,915.02