Finding the Fourth Proportional to 78,026.59, 107,675.87 and 42,215.82

Step by Step Solution

1. Step 1: Write the proportion equation
   78,026.59 : 107,675.87 = 42,215.82 : x
2. Step 2: Convert to fraction form
   78,026.59/107,675.87 = 42,215.82/x
3. Step 3: Cross multiply
   78,026.59x = 107,675.87 × 42,215.82
4. Step 4: Simplify right side
   78,026.59x = 4,545,624,531.40
5. Step 5: Solve for x
   x = 4,545,624,531.40/78,026.59
6. Step 6: Final answer
   x = 58,257.38