Finding the Fourth Proportional to 140,139.02, 210,282.34 and 81,016.22

Step by Step Solution

1. Step 1: Write the proportion equation
   140,139.02 : 210,282.34 = 81,016.22 : x
2. Step 2: Convert to fraction form
   140,139.02/210,282.34 = 81,016.22/x
3. Step 3: Cross multiply
   140,139.02x = 210,282.34 × 81,016.22
4. Step 4: Simplify right side
   140,139.02x = 17,036,280,319.55
5. Step 5: Solve for x
   x = 17,036,280,319.55/140,139.02
6. Step 6: Final answer
   x = 121,567.00