Finding the Fourth Proportional to 123,283.56, 170,077.30 and 72,270.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123,283.56 : 170,077.30 = 72,270.42 : x
2. Step 2: Convert to fraction form
   123,283.56/170,077.30 = 72,270.42/x
3. Step 3: Cross multiply
   123,283.56x = 170,077.30 × 72,270.42
4. Step 4: Simplify right side
   123,283.56x = 12,291,557,903.47
5. Step 5: Solve for x
   x = 12,291,557,903.47/123,283.56
6. Step 6: Final answer
   x = 99,701.52