Finding the Fourth Proportional to 78,046.31, 107,703.90 and 42,236.32

Step by Step Solution

1. Step 1: Write the proportion equation
   78,046.31 : 107,703.90 = 42,236.32 : x
2. Step 2: Convert to fraction form
   78,046.31/107,703.90 = 42,236.32/x
3. Step 3: Cross multiply
   78,046.31x = 107,703.90 × 42,236.32
4. Step 4: Simplify right side
   78,046.31x = 4,549,016,385.65
5. Step 5: Solve for x
   x = 4,549,016,385.65/78,046.31
6. Step 6: Final answer
   x = 58,286.12