Finding the Fourth Proportional to 9,123.63, 12,590.81 and 5,588.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.63 : 12,590.81 = 5,588.79 : x
2. Step 2: Convert to fraction form
   9,123.63/12,590.81 = 5,588.79/x
3. Step 3: Cross multiply
   9,123.63x = 12,590.81 × 5,588.79
4. Step 4: Simplify right side
   9,123.63x = 70,367,393.02
5. Step 5: Solve for x
   x = 70,367,393.02/9,123.63
6. Step 6: Final answer
   x = 7,712.65