Finding the Fourth Proportional to 5,714.76, 7,894.35 and 5,415.51

Step by Step Solution

1. Step 1: Write the proportion equation
   5,714.76 : 7,894.35 = 5,415.51 : x
2. Step 2: Convert to fraction form
   5,714.76/7,894.35 = 5,415.51/x
3. Step 3: Cross multiply
   5,714.76x = 7,894.35 × 5,415.51
4. Step 4: Simplify right side
   5,714.76x = 42,751,931.37
5. Step 5: Solve for x
   x = 42,751,931.37/5,714.76
6. Step 6: Final answer
   x = 7,480.97