Finding the Fourth Proportional to 339,978.10, 510,030.23 and 112,289.49

Step by Step Solution

1. Step 1: Write the proportion equation
   339,978.10 : 510,030.23 = 112,289.49 : x
2. Step 2: Convert to fraction form
   339,978.10/510,030.23 = 112,289.49/x
3. Step 3: Cross multiply
   339,978.10x = 510,030.23 × 112,289.49
4. Step 4: Simplify right side
   339,978.10x = 57,271,034,411.28
5. Step 5: Solve for x
   x = 57,271,034,411.28/339,978.10
6. Step 6: Final answer
   x = 168,455.07