Finding the Fourth Proportional to 48,499.10, 66,918.72 and 28,352.10

Step by Step Solution

1. Step 1: Write the proportion equation
   48,499.10 : 66,918.72 = 28,352.10 : x
2. Step 2: Convert to fraction form
   48,499.10/66,918.72 = 28,352.10/x
3. Step 3: Cross multiply
   48,499.10x = 66,918.72 × 28,352.10
4. Step 4: Simplify right side
   48,499.10x = 1,897,286,241.31
5. Step 5: Solve for x
   x = 1,897,286,241.31/48,499.10
6. Step 6: Final answer
   x = 39,120.03