Finding the Fourth Proportional to 478,667.54, 660,549.83 and 260,883.09

Step by Step Solution

1. Step 1: Write the proportion equation
   478,667.54 : 660,549.83 = 260,883.09 : x
2. Step 2: Convert to fraction form
   478,667.54/660,549.83 = 260,883.09/x
3. Step 3: Cross multiply
   478,667.54x = 660,549.83 × 260,883.09
4. Step 4: Simplify right side
   478,667.54x = 172,326,279,444.96
5. Step 5: Solve for x
   x = 172,326,279,444.96/478,667.54
6. Step 6: Final answer
   x = 360,012.47