Finding the Fourth Proportional to 2,346.82, 3,237.96 and 1,389.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,346.82 : 3,237.96 = 1,389.55 : x
2. Step 2: Convert to fraction form
   2,346.82/3,237.96 = 1,389.55/x
3. Step 3: Cross multiply
   2,346.82x = 3,237.96 × 1,389.55
4. Step 4: Simplify right side
   2,346.82x = 4,499,307.32
5. Step 5: Solve for x
   x = 4,499,307.32/2,346.82
6. Step 6: Final answer
   x = 1,917.19