Finding the Fourth Proportional to 78,026.15, 107,675.33 and 42,215.38

Step by Step Solution

1. Step 1: Write the proportion equation
   78,026.15 : 107,675.33 = 42,215.38 : x
2. Step 2: Convert to fraction form
   78,026.15/107,675.33 = 42,215.38/x
3. Step 3: Cross multiply
   78,026.15x = 107,675.33 × 42,215.38
4. Step 4: Simplify right side
   78,026.15x = 4,545,554,492.31
5. Step 5: Solve for x
   x = 4,545,554,492.31/78,026.15
6. Step 6: Final answer
   x = 58,256.81