Finding the Fourth Proportional to 9,123.82, 12,590.75 and 5,146.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.82 : 12,590.75 = 5,146.21 : x
2. Step 2: Convert to fraction form
   9,123.82/12,590.75 = 5,146.21/x
3. Step 3: Cross multiply
   9,123.82x = 12,590.75 × 5,146.21
4. Step 4: Simplify right side
   9,123.82x = 64,794,643.56
5. Step 5: Solve for x
   x = 64,794,643.56/9,123.82
6. Step 6: Final answer
   x = 7,101.70