Finding the Fourth Proportional to 28,076.42, 42,125.27 and 13,091.22

Step by Step Solution

1. Step 1: Write the proportion equation
   28,076.42 : 42,125.27 = 13,091.22 : x
2. Step 2: Convert to fraction form
   28,076.42/42,125.27 = 13,091.22/x
3. Step 3: Cross multiply
   28,076.42x = 42,125.27 × 13,091.22
4. Step 4: Simplify right side
   28,076.42x = 551,471,111.67
5. Step 5: Solve for x
   x = 551,471,111.67/28,076.42
6. Step 6: Final answer
   x = 19,641.79