Finding the Fourth Proportional to 140,434.10, 210,323.10 and 137,615.30

Step by Step Solution

1. Step 1: Write the proportion equation
   140,434.10 : 210,323.10 = 137,615.30 : x
2. Step 2: Convert to fraction form
   140,434.10/210,323.10 = 137,615.30/x
3. Step 3: Cross multiply
   140,434.10x = 210,323.10 × 137,615.30
4. Step 4: Simplify right side
   140,434.10x = 28,943,676,503.43
5. Step 5: Solve for x
   x = 28,943,676,503.43/140,434.10
6. Step 6: Final answer
   x = 206,101.48