Finding the Fourth Proportional to 171,111.17, 256,710.50 and 71,238.17

Step by Step Solution

1. Step 1: Write the proportion equation
   171,111.17 : 256,710.50 = 71,238.17 : x
2. Step 2: Convert to fraction form
   171,111.17/256,710.50 = 71,238.17/x
3. Step 3: Cross multiply
   171,111.17x = 256,710.50 × 71,238.17
4. Step 4: Simplify right side
   171,111.17x = 18,287,584,600.04
5. Step 5: Solve for x
   x = 18,287,584,600.04/171,111.17
6. Step 6: Final answer
   x = 106,875.46