Finding the Third Proportional to 870,120,690.75 and 1,380,065,434.88

Step by Step Solution

1. Step 1: Write the proportion equation
   870,120,690.75 : 1,380,065,434.88 = 1,380,065,434.88 : x
2. Step 2: Convert to fraction form
   870,120,690.75/1,380,065,434.88 = 1,380,065,434.88/x
3. Step 3: Cross multiply
   870,120,690.75x = 1,380,065,434.88 × 1,380,065,434.88
4. Step 4: Simplify right side
   870,120,690.75x = 1,904,580,604,536,722,944
5. Step 5: Solve for x
   x = 1,904,580,604,536,722,944/870,120,690.75
6. Step 6: Final answer
   x = 2,188,869,457.75