Finding the Fourth Proportional to 28,419.42, 42,627.60 and 8,697.98

Step by Step Solution

1. Step 1: Write the proportion equation
   28,419.42 : 42,627.60 = 8,697.98 : x
2. Step 2: Convert to fraction form
   28,419.42/42,627.60 = 8,697.98/x
3. Step 3: Cross multiply
   28,419.42x = 42,627.60 × 8,697.98
4. Step 4: Simplify right side
   28,419.42x = 370,774,012.25
5. Step 5: Solve for x
   x = 370,774,012.25/28,419.42
6. Step 6: Final answer
   x = 13,046.50