Finding the Third Proportional to 551,157,528 and 816,404,550

Step by Step Solution

1. Step 1: Write the proportion equation
   551,157,528 : 816,404,550 = 816,404,550 : x
2. Step 2: Convert to fraction form
   551,157,528/816,404,550 = 816,404,550/x
3. Step 3: Cross multiply
   551,157,528x = 816,404,550 × 816,404,550
4. Step 4: Simplify right side
   551,157,528x = 666,516,389,260,702,464
5. Step 5: Solve for x
   x = 666,516,389,260,702,464/551,157,528
6. Step 6: Final answer
   x = 1,209,302,886.02