Finding the Fourth Proportional to 13,354.01, 18,428.86 and 7,385.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,354.01 : 18,428.86 = 7,385.79 : x
2. Step 2: Convert to fraction form
   13,354.01/18,428.86 = 7,385.79/x
3. Step 3: Cross multiply
   13,354.01x = 18,428.86 × 7,385.79
4. Step 4: Simplify right side
   13,354.01x = 136,111,689.90
5. Step 5: Solve for x
   x = 136,111,689.90/13,354.01
6. Step 6: Final answer
   x = 10,192.57