Finding the Third Proportional to 142,266,656 and 213,399,970.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,266,656 : 213,399,970.50 = 213,399,970.50 : x
2. Step 2: Convert to fraction form
   142,266,656/213,399,970.50 = 213,399,970.50/x
3. Step 3: Cross multiply
   142,266,656x = 213,399,970.50 × 213,399,970.50
4. Step 4: Simplify right side
   142,266,656x = 45,539,547,409,400,872
5. Step 5: Solve for x
   x = 45,539,547,409,400,872/142,266,656
6. Step 6: Final answer
   x = 320,099,935.50