Finding the Fourth Proportional to 9,123.98, 12,590.42 and 5,346.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.98 : 12,590.42 = 5,346.92 : x
2. Step 2: Convert to fraction form
   9,123.98/12,590.42 = 5,346.92/x
3. Step 3: Cross multiply
   9,123.98x = 12,590.42 × 5,346.92
4. Step 4: Simplify right side
   9,123.98x = 67,319,968.51
5. Step 5: Solve for x
   x = 67,319,968.51/9,123.98
6. Step 6: Final answer
   x = 7,378.36