Finding the Fourth Proportional to 112,587.78, 155,366.52 and 67,290.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,587.78 : 155,366.52 = 67,290.72 : x
2. Step 2: Convert to fraction form
   112,587.78/155,366.52 = 67,290.72/x
3. Step 3: Cross multiply
   112,587.78x = 155,366.52 × 67,290.72
4. Step 4: Simplify right side
   112,587.78x = 10,454,724,994.69
5. Step 5: Solve for x
   x = 10,454,724,994.69/112,587.78
6. Step 6: Final answer
   x = 92,858.43