Finding the Third Proportional to 549,507 and 871,780.50

Step by Step Solution

1. Step 1: Write the proportion equation
   549,507 : 871,780.50 = 871,780.50 : x
2. Step 2: Convert to fraction form
   549,507/871,780.50 = 871,780.50/x
3. Step 3: Cross multiply
   549,507x = 871,780.50 × 871,780.50
4. Step 4: Simplify right side
   549,507x = 760,001,240,180.25
5. Step 5: Solve for x
   x = 760,001,240,180.25/549,507
6. Step 6: Final answer
   x = 1,383,060.16