Finding the Fourth Proportional to 139,004.97, 208,432.50 and 74,997.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,004.97 : 208,432.50 = 74,997.42 : x
2. Step 2: Convert to fraction form
   139,004.97/208,432.50 = 74,997.42/x
3. Step 3: Cross multiply
   139,004.97x = 208,432.50 × 74,997.42
4. Step 4: Simplify right side
   139,004.97x = 15,631,899,744.15
5. Step 5: Solve for x
   x = 15,631,899,744.15/139,004.97
6. Step 6: Final answer
   x = 112,455.69