Finding the Third Proportional to 387,537 and 831,130.50

Step by Step Solution

1. Step 1: Write the proportion equation
   387,537 : 831,130.50 = 831,130.50 : x
2. Step 2: Convert to fraction form
   387,537/831,130.50 = 831,130.50/x
3. Step 3: Cross multiply
   387,537x = 831,130.50 × 831,130.50
4. Step 4: Simplify right side
   387,537x = 690,777,908,030.25
5. Step 5: Solve for x
   x = 690,777,908,030.25/387,537
6. Step 6: Final answer
   x = 1,782,482.47