Finding the Fourth Proportional to 1,337.90, 1,845.86 and 840.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,337.90 : 1,845.86 = 840.74 : x
2. Step 2: Convert to fraction form
   1,337.90/1,845.86 = 840.74/x
3. Step 3: Cross multiply
   1,337.90x = 1,845.86 × 840.74
4. Step 4: Simplify right side
   1,337.90x = 1,551,888.34
5. Step 5: Solve for x
   x = 1,551,888.34/1,337.90
6. Step 6: Final answer
   x = 1,159.94