Finding the Fourth Proportional to 1,945.98, 2,917.60 and 904.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.98 : 2,917.60 = 904.88 : x
2. Step 2: Convert to fraction form
   1,945.98/2,917.60 = 904.88/x
3. Step 3: Cross multiply
   1,945.98x = 2,917.60 × 904.88
4. Step 4: Simplify right side
   1,945.98x = 2,640,077.89
5. Step 5: Solve for x
   x = 2,640,077.89/1,945.98
6. Step 6: Final answer
   x = 1,356.68