Finding the Fourth Proportional to 120,553.30, 166,355.43 and 69,568.15

Step by Step Solution

1. Step 1: Write the proportion equation
   120,553.30 : 166,355.43 = 69,568.15 : x
2. Step 2: Convert to fraction form
   120,553.30/166,355.43 = 69,568.15/x
3. Step 3: Cross multiply
   120,553.30x = 166,355.43 × 69,568.15
4. Step 4: Simplify right side
   120,553.30x = 11,573,039,507.55
5. Step 5: Solve for x
   x = 11,573,039,507.55/120,553.30
6. Step 6: Final answer
   x = 95,999.36