Finding the Third Proportional to 199,590 and 431,164.50

Step by Step Solution

1. Step 1: Write the proportion equation
   199,590 : 431,164.50 = 431,164.50 : x
2. Step 2: Convert to fraction form
   199,590/431,164.50 = 431,164.50/x
3. Step 3: Cross multiply
   199,590x = 431,164.50 × 431,164.50
4. Step 4: Simplify right side
   199,590x = 185,902,826,060.25
5. Step 5: Solve for x
   x = 185,902,826,060.25/199,590
6. Step 6: Final answer
   x = 931,423.55