Finding the Fourth Proportional to 9,018.42, 13,528.98 and 2,777.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,018.42 : 13,528.98 = 2,777.91 : x
2. Step 2: Convert to fraction form
   9,018.42/13,528.98 = 2,777.91/x
3. Step 3: Cross multiply
   9,018.42x = 13,528.98 × 2,777.91
4. Step 4: Simplify right side
   9,018.42x = 37,582,281.89
5. Step 5: Solve for x
   x = 37,582,281.89/9,018.42
6. Step 6: Final answer
   x = 4,167.28