Finding the Fourth Proportional to 28,485.48, 42,737.34 and 13,695.48

Step by Step Solution

1. Step 1: Write the proportion equation
   28,485.48 : 42,737.34 = 13,695.48 : x
2. Step 2: Convert to fraction form
   28,485.48/42,737.34 = 13,695.48/x
3. Step 3: Cross multiply
   28,485.48x = 42,737.34 × 13,695.48
4. Step 4: Simplify right side
   28,485.48x = 585,308,385.22
5. Step 5: Solve for x
   x = 585,308,385.22/28,485.48
6. Step 6: Final answer
   x = 20,547.60