Finding the Fourth Proportional to 123,381.42, 170,267.55 and 72,395.04

Step by Step Solution

1. Step 1: Write the proportion equation
   123,381.42 : 170,267.55 = 72,395.04 : x
2. Step 2: Convert to fraction form
   123,381.42/170,267.55 = 72,395.04/x
3. Step 3: Cross multiply
   123,381.42x = 170,267.55 × 72,395.04
4. Step 4: Simplify right side
   123,381.42x = 12,326,526,092.95
5. Step 5: Solve for x
   x = 12,326,526,092.95/123,381.42
6. Step 6: Final answer
   x = 99,905.85