Finding the Fourth Proportional to 428,603.34, 642,841.81 and 113,082.42

Step by Step Solution

1. Step 1: Write the proportion equation
   428,603.34 : 642,841.81 = 113,082.42 : x
2. Step 2: Convert to fraction form
   428,603.34/642,841.81 = 113,082.42/x
3. Step 3: Cross multiply
   428,603.34x = 642,841.81 × 113,082.42
4. Step 4: Simplify right side
   428,603.34x = 72,694,107,551.98
5. Step 5: Solve for x
   x = 72,694,107,551.98/428,603.34
6. Step 6: Final answer
   x = 169,606.96