Finding the Third Proportional to 89,490,148 and 138,065,724.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,490,148 : 138,065,724.50 = 138,065,724.50 : x
2. Step 2: Convert to fraction form
   89,490,148/138,065,724.50 = 138,065,724.50/x
3. Step 3: Cross multiply
   89,490,148x = 138,065,724.50 × 138,065,724.50
4. Step 4: Simplify right side
   89,490,148x = 19,062,144,281,709,900
5. Step 5: Solve for x
   x = 19,062,144,281,709,900/89,490,148
6. Step 6: Final answer
   x = 213,008,299.88