Finding the Fourth Proportional to 841,128.55, 1,160,742.42 and 478,544.61

Step by Step Solution

1. Step 1: Write the proportion equation
   841,128.55 : 1,160,742.42 = 478,544.61 : x
2. Step 2: Convert to fraction form
   841,128.55/1,160,742.42 = 478,544.61/x
3. Step 3: Cross multiply
   841,128.55x = 1,160,742.42 × 478,544.61
4. Step 4: Simplify right side
   841,128.55x = 555,467,022,885.64
5. Step 5: Solve for x
   x = 555,467,022,885.64/841,128.55
6. Step 6: Final answer
   x = 660,383.03