Finding the Fourth Proportional to 139,471.50, 209,966.25 and 127,071.22

Step by Step Solution

1. Step 1: Write the proportion equation
   139,471.50 : 209,966.25 = 127,071.22 : x
2. Step 2: Convert to fraction form
   139,471.50/209,966.25 = 127,071.22/x
3. Step 3: Cross multiply
   139,471.50x = 209,966.25 × 127,071.22
4. Step 4: Simplify right side
   139,471.50x = 26,680,667,546.33
5. Step 5: Solve for x
   x = 26,680,667,546.33/139,471.50
6. Step 6: Final answer
   x = 191,298.35