Finding the Third Proportional to 354,830.63 and 561,790.69

Step by Step Solution

1. Step 1: Write the proportion equation
   354,830.63 : 561,790.69 = 561,790.69 : x
2. Step 2: Convert to fraction form
   354,830.63/561,790.69 = 561,790.69/x
3. Step 3: Cross multiply
   354,830.63x = 561,790.69 × 561,790.69
4. Step 4: Simplify right side
   354,830.63x = 315,608,776,561.72
5. Step 5: Solve for x
   x = 315,608,776,561.72/354,830.63
6. Step 6: Final answer
   x = 889,463.18