Finding the Fourth Proportional to 6,427.82, 8,870.10 and 3,777.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,427.82 : 8,870.10 = 3,777.50 : x
2. Step 2: Convert to fraction form
   6,427.82/8,870.10 = 3,777.50/x
3. Step 3: Cross multiply
   6,427.82x = 8,870.10 × 3,777.50
4. Step 4: Simplify right side
   6,427.82x = 33,506,802.75
5. Step 5: Solve for x
   x = 33,506,802.75/6,427.82
6. Step 6: Final answer
   x = 5,212.78