Finding the Third Proportional to 358,956,738 and 780,806,196

Step by Step Solution

1. Step 1: Write the proportion equation
   358,956,738 : 780,806,196 = 780,806,196 : x
2. Step 2: Convert to fraction form
   358,956,738/780,806,196 = 780,806,196/x
3. Step 3: Cross multiply
   358,956,738x = 780,806,196 × 780,806,196
4. Step 4: Simplify right side
   358,956,738x = 609,658,315,711,990,400
5. Step 5: Solve for x
   x = 609,658,315,711,990,400/358,956,738
6. Step 6: Final answer
   x = 1,698,417,249.69