Finding the Fourth Proportional to 1,642.69, 2,463.72 and 1,056.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.69 : 2,463.72 = 1,056.77 : x
2. Step 2: Convert to fraction form
   1,642.69/2,463.72 = 1,056.77/x
3. Step 3: Cross multiply
   1,642.69x = 2,463.72 × 1,056.77
4. Step 4: Simplify right side
   1,642.69x = 2,603,585.38
5. Step 5: Solve for x
   x = 2,603,585.38/1,642.69
6. Step 6: Final answer
   x = 1,584.95