Finding the Fourth Proportional to 1,372.01, 1,892.75 and 840.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.01 : 1,892.75 = 840.69 : x
2. Step 2: Convert to fraction form
   1,372.01/1,892.75 = 840.69/x
3. Step 3: Cross multiply
   1,372.01x = 1,892.75 × 840.69
4. Step 4: Simplify right side
   1,372.01x = 1,591,211.79
5. Step 5: Solve for x
   x = 1,591,211.79/1,372.01
6. Step 6: Final answer
   x = 1,159.77