Finding the Fourth Proportional to 123,141.36, 169,856.28 and 85,401.84

Step by Step Solution

1. Step 1: Write the proportion equation
   123,141.36 : 169,856.28 = 85,401.84 : x
2. Step 2: Convert to fraction form
   123,141.36/169,856.28 = 85,401.84/x
3. Step 3: Cross multiply
   123,141.36x = 169,856.28 × 85,401.84
4. Step 4: Simplify right side
   123,141.36x = 14,506,038,847.56
5. Step 5: Solve for x
   x = 14,506,038,847.56/123,141.36
6. Step 6: Final answer
   x = 117,799.89