Finding the Fourth Proportional to 478,118.56, 717,061.20 and 197,716

Step by Step Solution

1. Step 1: Write the proportion equation
   478,118.56 : 717,061.20 = 197,716 : x
2. Step 2: Convert to fraction form
   478,118.56/717,061.20 = 197,716/x
3. Step 3: Cross multiply
   478,118.56x = 717,061.20 × 197,716
4. Step 4: Simplify right side
   478,118.56x = 141,774,472,219.20
5. Step 5: Solve for x
   x = 141,774,472,219.20/478,118.56
6. Step 6: Final answer
   x = 296,525.77