Finding the Fourth Proportional to 48,499.30, 72,734.55 and 18,900.10

Step by Step Solution

1. Step 1: Write the proportion equation
   48,499.30 : 72,734.55 = 18,900.10 : x
2. Step 2: Convert to fraction form
   48,499.30/72,734.55 = 18,900.10/x
3. Step 3: Cross multiply
   48,499.30x = 72,734.55 × 18,900.10
4. Step 4: Simplify right side
   48,499.30x = 1,374,690,268.46
5. Step 5: Solve for x
   x = 1,374,690,268.46/48,499.30
6. Step 6: Final answer
   x = 28,344.54