Finding the Third Proportional to 521,736.19 and 824,635.69

Step by Step Solution

1. Step 1: Write the proportion equation
   521,736.19 : 824,635.69 = 824,635.69 : x
2. Step 2: Convert to fraction form
   521,736.19/824,635.69 = 824,635.69/x
3. Step 3: Cross multiply
   521,736.19x = 824,635.69 × 824,635.69
4. Step 4: Simplify right side
   521,736.19x = 680,024,017,098.60
5. Step 5: Solve for x
   x = 680,024,017,098.60/521,736.19
6. Step 6: Final answer
   x = 1,303,386.72