Finding the Fourth Proportional to 7,123.32, 9,830.18 and 3,936.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,123.32 : 9,830.18 = 3,936.86 : x
2. Step 2: Convert to fraction form
   7,123.32/9,830.18 = 3,936.86/x
3. Step 3: Cross multiply
   7,123.32x = 9,830.18 × 3,936.86
4. Step 4: Simplify right side
   7,123.32x = 38,699,973.60
5. Step 5: Solve for x
   x = 38,699,973.60/7,123.32
6. Step 6: Final answer
   x = 5,432.86