Finding the Fourth Proportional to 13,353.83, 18,428.57 and 7,385.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,353.83 : 18,428.57 = 7,385.91 : x
2. Step 2: Convert to fraction form
   13,353.83/18,428.57 = 7,385.91/x
3. Step 3: Cross multiply
   13,353.83x = 18,428.57 × 7,385.91
4. Step 4: Simplify right side
   13,353.83x = 136,111,722.52
5. Step 5: Solve for x
   x = 136,111,722.52/13,353.83
6. Step 6: Final answer
   x = 10,192.71