Finding the Fourth Proportional to 13,820.52, 19,065.72 and 9,345.84

Step by Step Solution

1. Step 1: Write the proportion equation
   13,820.52 : 19,065.72 = 9,345.84 : x
2. Step 2: Convert to fraction form
   13,820.52/19,065.72 = 9,345.84/x
3. Step 3: Cross multiply
   13,820.52x = 19,065.72 × 9,345.84
4. Step 4: Simplify right side
   13,820.52x = 178,185,168.60
5. Step 5: Solve for x
   x = 178,185,168.60/13,820.52
6. Step 6: Final answer
   x = 12,892.80