Finding the Fourth Proportional to 123,680.25, 170,682.93 and 72,692.25

Step by Step Solution

1. Step 1: Write the proportion equation
   123,680.25 : 170,682.93 = 72,692.25 : x
2. Step 2: Convert to fraction form
   123,680.25/170,682.93 = 72,692.25/x
3. Step 3: Cross multiply
   123,680.25x = 170,682.93 × 72,692.25
4. Step 4: Simplify right side
   123,680.25x = 12,407,326,218.29
5. Step 5: Solve for x
   x = 12,407,326,218.29/123,680.25
6. Step 6: Final answer
   x = 100,317.76