Finding the Fourth Proportional to 478,914.72, 718,346.16 and 146,490.72

Step by Step Solution

1. Step 1: Write the proportion equation
   478,914.72 : 718,346.16 = 146,490.72 : x
2. Step 2: Convert to fraction form
   478,914.72/718,346.16 = 146,490.72/x
3. Step 3: Cross multiply
   478,914.72x = 718,346.16 × 146,490.72
4. Step 4: Simplify right side
   478,914.72x = 105,231,046,187.64
5. Step 5: Solve for x
   x = 105,231,046,187.64/478,914.72
6. Step 6: Final answer
   x = 219,728.15