Finding the Third Proportional to 411,416,145 and 878,628,667.50

Step by Step Solution

1. Step 1: Write the proportion equation
   411,416,145 : 878,628,667.50 = 878,628,667.50 : x
2. Step 2: Convert to fraction form
   411,416,145/878,628,667.50 = 878,628,667.50/x
3. Step 3: Cross multiply
   411,416,145x = 878,628,667.50 × 878,628,667.50
4. Step 4: Simplify right side
   411,416,145x = 771,988,335,352,825,600
5. Step 5: Solve for x
   x = 771,988,335,352,825,600/411,416,145
6. Step 6: Final answer
   x = 1,876,417,210.98