Finding the Third Proportional to 188,791,442 and 415,047,978

Step by Step Solution

1. Step 1: Write the proportion equation
   188,791,442 : 415,047,978 = 415,047,978 : x
2. Step 2: Convert to fraction form
   188,791,442/415,047,978 = 415,047,978/x
3. Step 3: Cross multiply
   188,791,442x = 415,047,978 × 415,047,978
4. Step 4: Simplify right side
   188,791,442x = 172,264,824,041,888,480
5. Step 5: Solve for x
   x = 172,264,824,041,888,480/188,791,442
6. Step 6: Final answer
   x = 912,460,979.25