Finding the Fourth Proportional to 1,425.86, 1,967.88 and 836.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.86 : 1,967.88 = 836.63 : x
2. Step 2: Convert to fraction form
   1,425.86/1,967.88 = 836.63/x
3. Step 3: Cross multiply
   1,425.86x = 1,967.88 × 836.63
4. Step 4: Simplify right side
   1,425.86x = 1,646,377.61
5. Step 5: Solve for x
   x = 1,646,377.61/1,425.86
6. Step 6: Final answer
   x = 1,154.66