Finding the Third Proportional to 431,980.50 and 608,058

Step by Step Solution

1. Step 1: Write the proportion equation
   431,980.50 : 608,058 = 608,058 : x
2. Step 2: Convert to fraction form
   431,980.50/608,058 = 608,058/x
3. Step 3: Cross multiply
   431,980.50x = 608,058 × 608,058
4. Step 4: Simplify right side
   431,980.50x = 369,734,531,364
5. Step 5: Solve for x
   x = 369,734,531,364/431,980.50
6. Step 6: Final answer
   x = 855,905.61