Finding the Fourth Proportional to 113,815.10, 170,333.85 and 99,818.30

Step by Step Solution

1. Step 1: Write the proportion equation
   113,815.10 : 170,333.85 = 99,818.30 : x
2. Step 2: Convert to fraction form
   113,815.10/170,333.85 = 99,818.30/x
3. Step 3: Cross multiply
   113,815.10x = 170,333.85 × 99,818.30
4. Step 4: Simplify right side
   113,815.10x = 17,002,435,339.46
5. Step 5: Solve for x
   x = 17,002,435,339.46/113,815.10
6. Step 6: Final answer
   x = 149,386.46