Finding the Fourth Proportional to 78,072.32, 107,739.76 and 42,262.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,072.32 : 107,739.76 = 42,262.62 : x
2. Step 2: Convert to fraction form
   78,072.32/107,739.76 = 42,262.62/x
3. Step 3: Cross multiply
   78,072.32x = 107,739.76 × 42,262.62
4. Step 4: Simplify right side
   78,072.32x = 4,553,364,535.77
5. Step 5: Solve for x
   x = 4,553,364,535.77/78,072.32
6. Step 6: Final answer
   x = 58,322.39