Finding the Third Proportional to 516,924 and 780,300

Step by Step Solution

1. Step 1: Write the proportion equation
   516,924 : 780,300 = 780,300 : x
2. Step 2: Convert to fraction form
   516,924/780,300 = 780,300/x
3. Step 3: Cross multiply
   516,924x = 780,300 × 780,300
4. Step 4: Simplify right side
   516,924x = 608,868,090,000
5. Step 5: Solve for x
   x = 608,868,090,000/516,924
6. Step 6: Final answer
   x = 1,177,867.71