Finding the Fourth Proportional to 9,407.07, 12,981.90 and 5,158.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,407.07 : 12,981.90 = 5,158.52 : x
2. Step 2: Convert to fraction form
   9,407.07/12,981.90 = 5,158.52/x
3. Step 3: Cross multiply
   9,407.07x = 12,981.90 × 5,158.52
4. Step 4: Simplify right side
   9,407.07x = 66,967,338.77
5. Step 5: Solve for x
   x = 66,967,338.77/9,407.07
6. Step 6: Final answer
   x = 7,118.83