Finding the Fourth Proportional to 1,685.67, 2,325.31 and 1,056.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.67 : 2,325.31 = 1,056.07 : x
2. Step 2: Convert to fraction form
   1,685.67/2,325.31 = 1,056.07/x
3. Step 3: Cross multiply
   1,685.67x = 2,325.31 × 1,056.07
4. Step 4: Simplify right side
   1,685.67x = 2,455,678.51
5. Step 5: Solve for x
   x = 2,455,678.51/1,685.67
6. Step 6: Final answer
   x = 1,456.79