Finding the Fourth Proportional to 12,385.34, 18,582.76 and 7,458.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,385.34 : 18,582.76 = 7,458.50 : x
2. Step 2: Convert to fraction form
   12,385.34/18,582.76 = 7,458.50/x
3. Step 3: Cross multiply
   12,385.34x = 18,582.76 × 7,458.50
4. Step 4: Simplify right side
   12,385.34x = 138,599,515.46
5. Step 5: Solve for x
   x = 138,599,515.46/12,385.34
6. Step 6: Final answer
   x = 11,190.61