Finding the Fourth Proportional to 112,290.89, 154,946.72 and 66,974.19

Step by Step Solution

1. Step 1: Write the proportion equation
   112,290.89 : 154,946.72 = 66,974.19 : x
2. Step 2: Convert to fraction form
   112,290.89/154,946.72 = 66,974.19/x
3. Step 3: Cross multiply
   112,290.89x = 154,946.72 × 66,974.19
4. Step 4: Simplify right side
   112,290.89x = 10,377,431,065.16
5. Step 5: Solve for x
   x = 10,377,431,065.16/112,290.89
6. Step 6: Final answer
   x = 92,415.61