Finding the Fourth Proportional to 112,423.22, 155,072.69 and 85,506.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,423.22 : 155,072.69 = 85,506.72 : x
2. Step 2: Convert to fraction form
   112,423.22/155,072.69 = 85,506.72/x
3. Step 3: Cross multiply
   112,423.22x = 155,072.69 × 85,506.72
4. Step 4: Simplify right side
   112,423.22x = 13,259,757,083.48
5. Step 5: Solve for x
   x = 13,259,757,083.48/112,423.22
6. Step 6: Final answer
   x = 117,945.00