Finding the Third Proportional to 64,648,410 and 100,378,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,648,410 : 100,378,978.50 = 100,378,978.50 : x
2. Step 2: Convert to fraction form
   64,648,410/100,378,978.50 = 100,378,978.50/x
3. Step 3: Cross multiply
   64,648,410x = 100,378,978.50 × 100,378,978.50
4. Step 4: Simplify right side
   64,648,410x = 10,075,939,324,703,462
5. Step 5: Solve for x
   x = 10,075,939,324,703,462/64,648,410
6. Step 6: Final answer
   x = 155,857,496.34