Finding the Fourth Proportional to 114,981.46, 172,464.99 and 42,920.31

Step by Step Solution

1. Step 1: Write the proportion equation
   114,981.46 : 172,464.99 = 42,920.31 : x
2. Step 2: Convert to fraction form
   114,981.46/172,464.99 = 42,920.31/x
3. Step 3: Cross multiply
   114,981.46x = 172,464.99 × 42,920.31
4. Step 4: Simplify right side
   114,981.46x = 7,402,250,834.95
5. Step 5: Solve for x
   x = 7,402,250,834.95/114,981.46
6. Step 6: Final answer
   x = 64,377.78