Finding the Fourth Proportional to 140,404.10, 210,606.15 and 140,404.10

Step by Step Solution

1. Step 1: Write the proportion equation
   140,404.10 : 210,606.15 = 140,404.10 : x
2. Step 2: Convert to fraction form
   140,404.10/210,606.15 = 140,404.10/x
3. Step 3: Cross multiply
   140,404.10x = 210,606.15 × 140,404.10
4. Step 4: Simplify right side
   140,404.10x = 29,569,966,945.22
5. Step 5: Solve for x
   x = 29,569,966,945.22/140,404.10
6. Step 6: Final answer
   x = 210,606.15