Finding the Third Proportional to 131,290,194 and 287,288,484

Step by Step Solution

1. Step 1: Write the proportion equation
   131,290,194 : 287,288,484 = 287,288,484 : x
2. Step 2: Convert to fraction form
   131,290,194/287,288,484 = 287,288,484/x
3. Step 3: Cross multiply
   131,290,194x = 287,288,484 × 287,288,484
4. Step 4: Simplify right side
   131,290,194x = 82,534,673,039,018,256
5. Step 5: Solve for x
   x = 82,534,673,039,018,256/131,290,194
6. Step 6: Final answer
   x = 628,643,088.45