Finding the Fourth Proportional to 513,606.40, 770,540.82 and 197,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   513,606.40 : 770,540.82 = 197,978.56 : x
2. Step 2: Convert to fraction form
   513,606.40/770,540.82 = 197,978.56/x
3. Step 3: Cross multiply
   513,606.40x = 770,540.82 × 197,978.56
4. Step 4: Simplify right side
   513,606.40x = 152,550,561,964.82
5. Step 5: Solve for x
   x = 152,550,561,964.82/513,606.40
6. Step 6: Final answer
   x = 297,018.42