Finding the Fourth Proportional to 13,558.32, 18,710.64 and 7,590.51

Step by Step Solution

1. Step 1: Write the proportion equation
   13,558.32 : 18,710.64 = 7,590.51 : x
2. Step 2: Convert to fraction form
   13,558.32/18,710.64 = 7,590.51/x
3. Step 3: Cross multiply
   13,558.32x = 18,710.64 × 7,590.51
4. Step 4: Simplify right side
   13,558.32x = 142,023,300.03
5. Step 5: Solve for x
   x = 142,023,300.03/13,558.32
6. Step 6: Final answer
   x = 10,474.99