Finding the Third Proportional to 249,925.50 and 387,099

Step by Step Solution

1. Step 1: Write the proportion equation
   249,925.50 : 387,099 = 387,099 : x
2. Step 2: Convert to fraction form
   249,925.50/387,099 = 387,099/x
3. Step 3: Cross multiply
   249,925.50x = 387,099 × 387,099
4. Step 4: Simplify right side
   249,925.50x = 149,845,635,801
5. Step 5: Solve for x
   x = 149,845,635,801/249,925.50
6. Step 6: Final answer
   x = 599,561.21