Finding the Fourth Proportional to 123,419.60, 170,315.61 and 73,118.60

Step by Step Solution

1. Step 1: Write the proportion equation
   123,419.60 : 170,315.61 = 73,118.60 : x
2. Step 2: Convert to fraction form
   123,419.60/170,315.61 = 73,118.60/x
3. Step 3: Cross multiply
   123,419.60x = 170,315.61 × 73,118.60
4. Step 4: Simplify right side
   123,419.60x = 12,453,238,109.77
5. Step 5: Solve for x
   x = 12,453,238,109.77/123,419.60
6. Step 6: Final answer
   x = 100,901.63