Finding the Fourth Proportional to 6,156.78, 8,507.46 and 4,385.30

Step by Step Solution

1. Step 1: Write the proportion equation
   6,156.78 : 8,507.46 = 4,385.30 : x
2. Step 2: Convert to fraction form
   6,156.78/8,507.46 = 4,385.30/x
3. Step 3: Cross multiply
   6,156.78x = 8,507.46 × 4,385.30
4. Step 4: Simplify right side
   6,156.78x = 37,307,764.34
5. Step 5: Solve for x
   x = 37,307,764.34/6,156.78
6. Step 6: Final answer
   x = 6,059.62