Finding the Fourth Proportional to 13,128.96, 19,700.94 and 4,807.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,128.96 : 19,700.94 = 4,807.86 : x
2. Step 2: Convert to fraction form
   13,128.96/19,700.94 = 4,807.86/x
3. Step 3: Cross multiply
   13,128.96x = 19,700.94 × 4,807.86
4. Step 4: Simplify right side
   13,128.96x = 94,719,361.39
5. Step 5: Solve for x
   x = 94,719,361.39/13,128.96
6. Step 6: Final answer
   x = 7,214.54