Finding the Fourth Proportional to 136,361.42, 204,627.32 and 52,128.71

Step by Step Solution

1. Step 1: Write the proportion equation
   136,361.42 : 204,627.32 = 52,128.71 : x
2. Step 2: Convert to fraction form
   136,361.42/204,627.32 = 52,128.71/x
3. Step 3: Cross multiply
   136,361.42x = 204,627.32 × 52,128.71
4. Step 4: Simplify right side
   136,361.42x = 10,666,958,222.36
5. Step 5: Solve for x
   x = 10,666,958,222.36/136,361.42
6. Step 6: Final answer
   x = 78,225.63