Finding the Fourth Proportional to 52,128.99, 71,937.59 and 30,918.33

Step by Step Solution

1. Step 1: Write the proportion equation
   52,128.99 : 71,937.59 = 30,918.33 : x
2. Step 2: Convert to fraction form
   52,128.99/71,937.59 = 30,918.33/x
3. Step 3: Cross multiply
   52,128.99x = 71,937.59 × 30,918.33
4. Step 4: Simplify right side
   52,128.99x = 2,224,189,992.43
5. Step 5: Solve for x
   x = 2,224,189,992.43/52,128.99
6. Step 6: Final answer
   x = 42,667.05