Finding the Fourth Proportional to 123,856, 170,953.08 and 75,490.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,856 : 170,953.08 = 75,490.72 : x
2. Step 2: Convert to fraction form
   123,856/170,953.08 = 75,490.72/x
3. Step 3: Cross multiply
   123,856x = 170,953.08 × 75,490.72
4. Step 4: Simplify right side
   123,856x = 12,905,371,095.42
5. Step 5: Solve for x
   x = 12,905,371,095.42/123,856
6. Step 6: Final answer
   x = 104,196.58