Finding the Third Proportional to 222,913 and 342,145.50

Step by Step Solution

1. Step 1: Write the proportion equation
   222,913 : 342,145.50 = 342,145.50 : x
2. Step 2: Convert to fraction form
   222,913/342,145.50 = 342,145.50/x
3. Step 3: Cross multiply
   222,913x = 342,145.50 × 342,145.50
4. Step 4: Simplify right side
   222,913x = 117,063,543,170.25
5. Step 5: Solve for x
   x = 117,063,543,170.25/222,913
6. Step 6: Final answer
   x = 525,153.50