Finding the Third Proportional to 139,076 and 299,118

Step by Step Solution

1. Step 1: Write the proportion equation
   139,076 : 299,118 = 299,118 : x
2. Step 2: Convert to fraction form
   139,076/299,118 = 299,118/x
3. Step 3: Cross multiply
   139,076x = 299,118 × 299,118
4. Step 4: Simplify right side
   139,076x = 89,471,577,924
5. Step 5: Solve for x
   x = 89,471,577,924/139,076
6. Step 6: Final answer
   x = 643,328.67