Finding the Third Proportional to 157,920 and 242,719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   157,920 : 242,719.50 = 242,719.50 : x
2. Step 2: Convert to fraction form
   157,920/242,719.50 = 242,719.50/x
3. Step 3: Cross multiply
   157,920x = 242,719.50 × 242,719.50
4. Step 4: Simplify right side
   157,920x = 58,912,755,680.25
5. Step 5: Solve for x
   x = 58,912,755,680.25/157,920
6. Step 6: Final answer
   x = 373,054.43