Finding the Third Proportional to 521,031.75 and 813,060

Step by Step Solution

1. Step 1: Write the proportion equation
   521,031.75 : 813,060 = 813,060 : x
2. Step 2: Convert to fraction form
   521,031.75/813,060 = 813,060/x
3. Step 3: Cross multiply
   521,031.75x = 813,060 × 813,060
4. Step 4: Simplify right side
   521,031.75x = 661,066,563,600
5. Step 5: Solve for x
   x = 661,066,563,600/521,031.75
6. Step 6: Final answer
   x = 1,268,764.45