Finding the Fourth Proportional to 288,980.38, 433,426.83 and 78,634.72

Step by Step Solution

1. Step 1: Write the proportion equation
   288,980.38 : 433,426.83 = 78,634.72 : x
2. Step 2: Convert to fraction form
   288,980.38/433,426.83 = 78,634.72/x
3. Step 3: Cross multiply
   288,980.38x = 433,426.83 × 78,634.72
4. Step 4: Simplify right side
   288,980.38x = 34,082,397,417.54
5. Step 5: Solve for x
   x = 34,082,397,417.54/288,980.38
6. Step 6: Final answer
   x = 117,940.18