Finding the Fourth Proportional to 676,111.41, 933,025.05 and 389,658.15

Step by Step Solution

1. Step 1: Write the proportion equation
   676,111.41 : 933,025.05 = 389,658.15 : x
2. Step 2: Convert to fraction form
   676,111.41/933,025.05 = 389,658.15/x
3. Step 3: Cross multiply
   676,111.41x = 933,025.05 × 389,658.15
4. Step 4: Simplify right side
   676,111.41x = 363,560,814,886.66
5. Step 5: Solve for x
   x = 363,560,814,886.66/676,111.41
6. Step 6: Final answer
   x = 537,723.24