Finding the Fourth Proportional to 28,335.42, 42,484.91 and 13,544.01

Step by Step Solution

1. Step 1: Write the proportion equation
   28,335.42 : 42,484.91 = 13,544.01 : x
2. Step 2: Convert to fraction form
   28,335.42/42,484.91 = 13,544.01/x
3. Step 3: Cross multiply
   28,335.42x = 42,484.91 × 13,544.01
4. Step 4: Simplify right side
   28,335.42x = 575,415,978.17
5. Step 5: Solve for x
   x = 575,415,978.17/28,335.42
6. Step 6: Final answer
   x = 20,307.30