Finding the Fourth Proportional to 123,871.95, 171,014.22 and 81,553.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,871.95 : 171,014.22 = 81,553.50 : x
2. Step 2: Convert to fraction form
   123,871.95/171,014.22 = 81,553.50/x
3. Step 3: Cross multiply
   123,871.95x = 171,014.22 × 81,553.50
4. Step 4: Simplify right side
   123,871.95x = 13,946,808,190.77
5. Step 5: Solve for x
   x = 13,946,808,190.77/123,871.95
6. Step 6: Final answer
   x = 112,590.53