Finding the Fourth Proportional to 112,620.78, 155,401.32 and 67,289.19

Step by Step Solution

1. Step 1: Write the proportion equation
   112,620.78 : 155,401.32 = 67,289.19 : x
2. Step 2: Convert to fraction form
   112,620.78/155,401.32 = 67,289.19/x
3. Step 3: Cross multiply
   112,620.78x = 155,401.32 × 67,289.19
4. Step 4: Simplify right side
   112,620.78x = 10,456,828,947.73
5. Step 5: Solve for x
   x = 10,456,828,947.73/112,620.78
6. Step 6: Final answer
   x = 92,849.91