Finding the Fourth Proportional to 9,100.55, 12,558.23 and 5,121.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,100.55 : 12,558.23 = 5,121.50 : x
2. Step 2: Convert to fraction form
   9,100.55/12,558.23 = 5,121.50/x
3. Step 3: Cross multiply
   9,100.55x = 12,558.23 × 5,121.50
4. Step 4: Simplify right side
   9,100.55x = 64,316,949.34
5. Step 5: Solve for x
   x = 64,316,949.34/9,100.55
6. Step 6: Final answer
   x = 7,067.37