Finding the Fourth Proportional to 112,680.66, 155,530.35 and 67,389.78

Step by Step Solution

1. Step 1: Write the proportion equation
   112,680.66 : 155,530.35 = 67,389.78 : x
2. Step 2: Convert to fraction form
   112,680.66/155,530.35 = 67,389.78/x
3. Step 3: Cross multiply
   112,680.66x = 155,530.35 × 67,389.78
4. Step 4: Simplify right side
   112,680.66x = 10,481,156,069.82
5. Step 5: Solve for x
   x = 10,481,156,069.82/112,680.66
6. Step 6: Final answer
   x = 93,016.46