Finding the Fourth Proportional to 1,397.76, 1,927.86 and 1,335.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.76 : 1,927.86 = 1,335.72 : x
2. Step 2: Convert to fraction form
   1,397.76/1,927.86 = 1,335.72/x
3. Step 3: Cross multiply
   1,397.76x = 1,927.86 × 1,335.72
4. Step 4: Simplify right side
   1,397.76x = 2,575,081.16
5. Step 5: Solve for x
   x = 2,575,081.16/1,397.76
6. Step 6: Final answer
   x = 1,842.29