Finding the Fourth Proportional to 143,322.30, 214,687.80 and 83,978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   143,322.30 : 214,687.80 = 83,978.10 : x
2. Step 2: Convert to fraction form
   143,322.30/214,687.80 = 83,978.10/x
3. Step 3: Cross multiply
   143,322.30x = 214,687.80 × 83,978.10
4. Step 4: Simplify right side
   143,322.30x = 18,029,073,537.18
5. Step 5: Solve for x
   x = 18,029,073,537.18/143,322.30
6. Step 6: Final answer
   x = 125,793.92