Finding the Fourth Proportional to 133,128.32, 199,788.81 and 52,087.32

Step by Step Solution

1. Step 1: Write the proportion equation
   133,128.32 : 199,788.81 = 52,087.32 : x
2. Step 2: Convert to fraction form
   133,128.32/199,788.81 = 52,087.32/x
3. Step 3: Cross multiply
   133,128.32x = 199,788.81 × 52,087.32
4. Step 4: Simplify right side
   133,128.32x = 10,406,463,678.89
5. Step 5: Solve for x
   x = 10,406,463,678.89/133,128.32
6. Step 6: Final answer
   x = 78,168.67