Finding the Fourth Proportional to 389,886.56, 584,850.76 and 123,667.28

Step by Step Solution

1. Step 1: Write the proportion equation
   389,886.56 : 584,850.76 = 123,667.28 : x
2. Step 2: Convert to fraction form
   389,886.56/584,850.76 = 123,667.28/x
3. Step 3: Cross multiply
   389,886.56x = 584,850.76 × 123,667.28
4. Step 4: Simplify right side
   389,886.56x = 72,326,902,695.13
5. Step 5: Solve for x
   x = 72,326,902,695.13/389,886.56
6. Step 6: Final answer
   x = 185,507.56