Finding the Third Proportional to 551,157,417 and 816,404,411.50

Step by Step Solution

1. Step 1: Write the proportion equation
   551,157,417 : 816,404,411.50 = 816,404,411.50 : x
2. Step 2: Convert to fraction form
   551,157,417/816,404,411.50 = 816,404,411.50/x
3. Step 3: Cross multiply
   551,157,417x = 816,404,411.50 × 816,404,411.50
4. Step 4: Simplify right side
   551,157,417x = 666,516,163,116,661,376
5. Step 5: Solve for x
   x = 666,516,163,116,661,376/551,157,417
6. Step 6: Final answer
   x = 1,209,302,719.26