Finding the Fourth Proportional to 8,922.42, 12,312.93 and 5,145.53

Step by Step Solution

1. Step 1: Write the proportion equation
   8,922.42 : 12,312.93 = 5,145.53 : x
2. Step 2: Convert to fraction form
   8,922.42/12,312.93 = 5,145.53/x
3. Step 3: Cross multiply
   8,922.42x = 12,312.93 × 5,145.53
4. Step 4: Simplify right side
   8,922.42x = 63,356,577.69
5. Step 5: Solve for x
   x = 63,356,577.69/8,922.42
6. Step 6: Final answer
   x = 7,100.83