Finding the Third Proportional to 356,943 and 515,719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,943 : 515,719.50 = 515,719.50 : x
2. Step 2: Convert to fraction form
   356,943/515,719.50 = 515,719.50/x
3. Step 3: Cross multiply
   356,943x = 515,719.50 × 515,719.50
4. Step 4: Simplify right side
   356,943x = 265,966,602,680.25
5. Step 5: Solve for x
   x = 265,966,602,680.25/356,943
6. Step 6: Final answer
   x = 745,123.46