Finding the Fourth Proportional to 13,445.65, 18,554.17 and 7,477.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,445.65 : 18,554.17 = 7,477.10 : x
2. Step 2: Convert to fraction form
   13,445.65/18,554.17 = 7,477.10/x
3. Step 3: Cross multiply
   13,445.65x = 18,554.17 × 7,477.10
4. Step 4: Simplify right side
   13,445.65x = 138,731,384.51
5. Step 5: Solve for x
   x = 138,731,384.51/13,445.65
6. Step 6: Final answer
   x = 10,317.94