Finding the Fourth Proportional to 53,480.02, 80,196.34 and 28,515.42

Step by Step Solution

1. Step 1: Write the proportion equation
   53,480.02 : 80,196.34 = 28,515.42 : x
2. Step 2: Convert to fraction form
   53,480.02/80,196.34 = 28,515.42/x
3. Step 3: Cross multiply
   53,480.02x = 80,196.34 × 28,515.42
4. Step 4: Simplify right side
   53,480.02x = 2,286,832,317.56
5. Step 5: Solve for x
   x = 2,286,832,317.56/53,480.02
6. Step 6: Final answer
   x = 42,760.50