Finding the Fourth Proportional to 123,899.63, 170,981.48 and 67,311

Step by Step Solution

1. Step 1: Write the proportion equation
   123,899.63 : 170,981.48 = 67,311 : x
2. Step 2: Convert to fraction form
   123,899.63/170,981.48 = 67,311/x
3. Step 3: Cross multiply
   123,899.63x = 170,981.48 × 67,311
4. Step 4: Simplify right side
   123,899.63x = 11,508,934,568.56
5. Step 5: Solve for x
   x = 11,508,934,568.56/123,899.63
6. Step 6: Final answer
   x = 92,889.18