Finding the Fourth Proportional to 116,005.10, 173,618.85 and 81,013.10

Step by Step Solution

1. Step 1: Write the proportion equation
   116,005.10 : 173,618.85 = 81,013.10 : x
2. Step 2: Convert to fraction form
   116,005.10/173,618.85 = 81,013.10/x
3. Step 3: Cross multiply
   116,005.10x = 173,618.85 × 81,013.10
4. Step 4: Simplify right side
   116,005.10x = 14,065,401,256.94
5. Step 5: Solve for x
   x = 14,065,401,256.94/116,005.10
6. Step 6: Final answer
   x = 121,248.13