Finding the Third Proportional to 142,453.69 and 311,374.13

Step by Step Solution

1. Step 1: Write the proportion equation
   142,453.69 : 311,374.13 = 311,374.13 : x
2. Step 2: Convert to fraction form
   142,453.69/311,374.13 = 311,374.13/x
3. Step 3: Cross multiply
   142,453.69x = 311,374.13 × 311,374.13
4. Step 4: Simplify right side
   142,453.69x = 96,953,845,719.52
5. Step 5: Solve for x
   x = 96,953,845,719.52/142,453.69
6. Step 6: Final answer
   x = 680,599.06