Finding the Fourth Proportional to 9,372.58, 12,938.60 and 5,392.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,372.58 : 12,938.60 = 5,392.91 : x
2. Step 2: Convert to fraction form
   9,372.58/12,938.60 = 5,392.91/x
3. Step 3: Cross multiply
   9,372.58x = 12,938.60 × 5,392.91
4. Step 4: Simplify right side
   9,372.58x = 69,776,751.15
5. Step 5: Solve for x
   x = 69,776,751.15/9,372.58
6. Step 6: Final answer
   x = 7,444.78