Finding the Fourth Proportional to 1,678.32, 2,316.38 and 1,604.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.32 : 2,316.38 = 1,604.52 : x
2. Step 2: Convert to fraction form
   1,678.32/2,316.38 = 1,604.52/x
3. Step 3: Cross multiply
   1,678.32x = 2,316.38 × 1,604.52
4. Step 4: Simplify right side
   1,678.32x = 3,716,670.02
5. Step 5: Solve for x
   x = 3,716,670.02/1,678.32
6. Step 6: Final answer
   x = 2,214.52