Finding the Fourth Proportional to 478,164.60, 659,871.72 and 263,312.28

Step by Step Solution

1. Step 1: Write the proportion equation
   478,164.60 : 659,871.72 = 263,312.28 : x
2. Step 2: Convert to fraction form
   478,164.60/659,871.72 = 263,312.28/x
3. Step 3: Cross multiply
   478,164.60x = 659,871.72 × 263,312.28
4. Step 4: Simplify right side
   478,164.60x = 173,752,327,100.72
5. Step 5: Solve for x
   x = 173,752,327,100.72/478,164.60
6. Step 6: Final answer
   x = 363,373.46