Finding the Third Proportional to 90,978,336 and 139,768,416

Step by Step Solution

1. Step 1: Write the proportion equation
   90,978,336 : 139,768,416 = 139,768,416 : x
2. Step 2: Convert to fraction form
   90,978,336/139,768,416 = 139,768,416/x
3. Step 3: Cross multiply
   90,978,336x = 139,768,416 × 139,768,416
4. Step 4: Simplify right side
   90,978,336x = 19,535,210,111,149,056
5. Step 5: Solve for x
   x = 19,535,210,111,149,056/90,978,336
6. Step 6: Final answer
   x = 214,723,757.00