Finding the Third Proportional to 556,978.78 and 836,699.63

Step by Step Solution

1. Step 1: Write the proportion equation
   556,978.78 : 836,699.63 = 836,699.63 : x
2. Step 2: Convert to fraction form
   556,978.78/836,699.63 = 836,699.63/x
3. Step 3: Cross multiply
   556,978.78x = 836,699.63 × 836,699.63
4. Step 4: Simplify right side
   556,978.78x = 700,066,262,475.14
5. Step 5: Solve for x
   x = 700,066,262,475.14/556,978.78
6. Step 6: Final answer
   x = 1,256,899.34