Finding the Fourth Proportional to 398,978.64, 598,462.14 and 185,627.22

Step by Step Solution

1. Step 1: Write the proportion equation
   398,978.64 : 598,462.14 = 185,627.22 : x
2. Step 2: Convert to fraction form
   398,978.64/598,462.14 = 185,627.22/x
3. Step 3: Cross multiply
   398,978.64x = 598,462.14 × 185,627.22
4. Step 4: Simplify right side
   398,978.64x = 111,090,863,323.45
5. Step 5: Solve for x
   x = 111,090,863,323.45/398,978.64
6. Step 6: Final answer
   x = 278,438.12