Finding the Fourth Proportional to 1,483.61, 2,047.38 and 853.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.61 : 2,047.38 = 853.91 : x
2. Step 2: Convert to fraction form
   1,483.61/2,047.38 = 853.91/x
3. Step 3: Cross multiply
   1,483.61x = 2,047.38 × 853.91
4. Step 4: Simplify right side
   1,483.61x = 1,748,267.38
5. Step 5: Solve for x
   x = 1,748,267.38/1,483.61
6. Step 6: Final answer
   x = 1,178.39