Finding the Fourth Proportional to 123,419.61, 170,315.61 and 73,118.61

Step by Step Solution

1. Step 1: Write the proportion equation
   123,419.61 : 170,315.61 = 73,118.61 : x
2. Step 2: Convert to fraction form
   123,419.61/170,315.61 = 73,118.61/x
3. Step 3: Cross multiply
   123,419.61x = 170,315.61 × 73,118.61
4. Step 4: Simplify right side
   123,419.61x = 12,453,240,664.50
5. Step 5: Solve for x
   x = 12,453,240,664.50/123,419.61
6. Step 6: Final answer
   x = 100,901.64