Finding the Fourth Proportional to 1,555,128.78, 2,332,343.23 and 557,856.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555,128.78 : 2,332,343.23 = 557,856.78 : x
2. Step 2: Convert to fraction form
   1,555,128.78/2,332,343.23 = 557,856.78/x
3. Step 3: Cross multiply
   1,555,128.78x = 2,332,343.23 × 557,856.78
4. Step 4: Simplify right side
   1,555,128.78x = 1,301,113,484,142.60
5. Step 5: Solve for x
   x = 1,301,113,484,142.60/1,555,128.78
6. Step 6: Final answer
   x = 836,659.64