Finding the Fourth Proportional to 1,397.86, 2,094.05 and 1,277.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.86 : 2,094.05 = 1,277.57 : x
2. Step 2: Convert to fraction form
   1,397.86/2,094.05 = 1,277.57/x
3. Step 3: Cross multiply
   1,397.86x = 2,094.05 × 1,277.57
4. Step 4: Simplify right side
   1,397.86x = 2,675,303.89
5. Step 5: Solve for x
   x = 2,675,303.89/1,397.86
6. Step 6: Final answer
   x = 1,913.86