Finding the Third Proportional to 89,488,908 and 138,189,570

Step by Step Solution

1. Step 1: Write the proportion equation
   89,488,908 : 138,189,570 = 138,189,570 : x
2. Step 2: Convert to fraction form
   89,488,908/138,189,570 = 138,189,570/x
3. Step 3: Cross multiply
   89,488,908x = 138,189,570 × 138,189,570
4. Step 4: Simplify right side
   89,488,908x = 19,096,357,256,784,900
5. Step 5: Solve for x
   x = 19,096,357,256,784,900/89,488,908
6. Step 6: Final answer
   x = 213,393,566.68