Finding the Third Proportional to 856,603,457 and 1,155,759,188

Step by Step Solution

1. Step 1: Write the proportion equation
   856,603,457 : 1,155,759,188 = 1,155,759,188 : x
2. Step 2: Convert to fraction form
   856,603,457/1,155,759,188 = 1,155,759,188/x
3. Step 3: Cross multiply
   856,603,457x = 1,155,759,188 × 1,155,759,188
4. Step 4: Simplify right side
   856,603,457x = 1,335,779,300,646,419,456
5. Step 5: Solve for x
   x = 1,335,779,300,646,419,456/856,603,457
6. Step 6: Final answer
   x = 1,559,390,508.79