Finding the Third Proportional to 188,076,457 and 290,499,589.50

Step by Step Solution

1. Step 1: Write the proportion equation
   188,076,457 : 290,499,589.50 = 290,499,589.50 : x
2. Step 2: Convert to fraction form
   188,076,457/290,499,589.50 = 290,499,589.50/x
3. Step 3: Cross multiply
   188,076,457x = 290,499,589.50 × 290,499,589.50
4. Step 4: Simplify right side
   188,076,457x = 84,390,011,499,668,512
5. Step 5: Solve for x
   x = 84,390,011,499,668,512/188,076,457
6. Step 6: Final answer
   x = 448,700,559.58