Finding the Third Proportional to 90,784,878 and 188,029,532

Step by Step Solution

1. Step 1: Write the proportion equation
   90,784,878 : 188,029,532 = 188,029,532 : x
2. Step 2: Convert to fraction form
   90,784,878/188,029,532 = 188,029,532/x
3. Step 3: Cross multiply
   90,784,878x = 188,029,532 × 188,029,532
4. Step 4: Simplify right side
   90,784,878x = 35,355,104,904,139,024
5. Step 5: Solve for x
   x = 35,355,104,904,139,024/90,784,878
6. Step 6: Final answer
   x = 389,438,259.80