Finding the Fourth Proportional to 478,742.18, 660,634.17 and 263,870.42

Step by Step Solution

1. Step 1: Write the proportion equation
   478,742.18 : 660,634.17 = 263,870.42 : x
2. Step 2: Convert to fraction form
   478,742.18/660,634.17 = 263,870.42/x
3. Step 3: Cross multiply
   478,742.18x = 660,634.17 × 263,870.42
4. Step 4: Simplify right side
   478,742.18x = 174,321,815,904.25
5. Step 5: Solve for x
   x = 174,321,815,904.25/478,742.18
6. Step 6: Final answer
   x = 364,124.62