Finding the Fourth Proportional to 478,722.72, 718,058.16 and 146,298.72

Step by Step Solution

1. Step 1: Write the proportion equation
   478,722.72 : 718,058.16 = 146,298.72 : x
2. Step 2: Convert to fraction form
   478,722.72/718,058.16 = 146,298.72/x
3. Step 3: Cross multiply
   478,722.72x = 718,058.16 × 146,298.72
4. Step 4: Simplify right side
   478,722.72x = 105,050,989,693.56
5. Step 5: Solve for x
   x = 105,050,989,693.56/478,722.72
6. Step 6: Final answer
   x = 219,440.16