Finding the Fourth Proportional to 1,376.89, 1,897.55 and 934.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.89 : 1,897.55 = 934.81 : x
2. Step 2: Convert to fraction form
   1,376.89/1,897.55 = 934.81/x
3. Step 3: Cross multiply
   1,376.89x = 1,897.55 × 934.81
4. Step 4: Simplify right side
   1,376.89x = 1,773,844.04
5. Step 5: Solve for x
   x = 1,773,844.04/1,376.89
6. Step 6: Final answer
   x = 1,288.30