Finding the Third Proportional to 148,390 and 349,940

Step by Step Solution

1. Step 1: Write the proportion equation
   148,390 : 349,940 = 349,940 : x
2. Step 2: Convert to fraction form
   148,390/349,940 = 349,940/x
3. Step 3: Cross multiply
   148,390x = 349,940 × 349,940
4. Step 4: Simplify right side
   148,390x = 122,458,003,600
5. Step 5: Solve for x
   x = 122,458,003,600/148,390
6. Step 6: Final answer
   x = 825,244.31