Finding the Fourth Proportional to 389,320.31, 584,084.34 and 123,085.86

Step by Step Solution

1. Step 1: Write the proportion equation
   389,320.31 : 584,084.34 = 123,085.86 : x
2. Step 2: Convert to fraction form
   389,320.31/584,084.34 = 123,085.86/x
3. Step 3: Cross multiply
   389,320.31x = 584,084.34 × 123,085.86
4. Step 4: Simplify right side
   389,320.31x = 71,892,523,301.43
5. Step 5: Solve for x
   x = 71,892,523,301.43/389,320.31
6. Step 6: Final answer
   x = 184,661.63