Finding the Fourth Proportional to 13,385.98, 18,473.21 and 7,417.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,385.98 : 18,473.21 = 7,417.63 : x
2. Step 2: Convert to fraction form
   13,385.98/18,473.21 = 7,417.63/x
3. Step 3: Cross multiply
   13,385.98x = 18,473.21 × 7,417.63
4. Step 4: Simplify right side
   13,385.98x = 137,027,388.32
5. Step 5: Solve for x
   x = 137,027,388.32/13,385.98
6. Step 6: Final answer
   x = 10,236.64