Finding the Third Proportional to 820,897,407 and 1,272,164,958

Step by Step Solution

1. Step 1: Write the proportion equation
   820,897,407 : 1,272,164,958 = 1,272,164,958 : x
2. Step 2: Convert to fraction form
   820,897,407/1,272,164,958 = 1,272,164,958/x
3. Step 3: Cross multiply
   820,897,407x = 1,272,164,958 × 1,272,164,958
4. Step 4: Simplify right side
   820,897,407x = 1,618,403,680,363,141,888
5. Step 5: Solve for x
   x = 1,618,403,680,363,141,888/820,897,407
6. Step 6: Final answer
   x = 1,971,505,411.71