Finding the Third Proportional to 139,603.50 and 187,261.88

Step by Step Solution

1. Step 1: Write the proportion equation
   139,603.50 : 187,261.88 = 187,261.88 : x
2. Step 2: Convert to fraction form
   139,603.50/187,261.88 = 187,261.88/x
3. Step 3: Cross multiply
   139,603.50x = 187,261.88 × 187,261.88
4. Step 4: Simplify right side
   139,603.50x = 35,067,009,828.52
5. Step 5: Solve for x
   x = 35,067,009,828.52/139,603.50
6. Step 6: Final answer
   x = 251,190.05