Finding the Fourth Proportional to 6,054.47, 8,358.59 and 3,931.90

Step by Step Solution

1. Step 1: Write the proportion equation
   6,054.47 : 8,358.59 = 3,931.90 : x
2. Step 2: Convert to fraction form
   6,054.47/8,358.59 = 3,931.90/x
3. Step 3: Cross multiply
   6,054.47x = 8,358.59 × 3,931.90
4. Step 4: Simplify right side
   6,054.47x = 32,865,128.95
5. Step 5: Solve for x
   x = 32,865,128.95/6,054.47
6. Step 6: Final answer
   x = 5,428.24