Finding the Fourth Proportional to 78,236.30, 107,966.12 and 42,426.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,236.30 : 107,966.12 = 42,426.30 : x
2. Step 2: Convert to fraction form
   78,236.30/107,966.12 = 42,426.30/x
3. Step 3: Cross multiply
   78,236.30x = 107,966.12 × 42,426.30
4. Step 4: Simplify right side
   78,236.30x = 4,580,603,103.02
5. Step 5: Solve for x
   x = 4,580,603,103.02/78,236.30
6. Step 6: Final answer
   x = 58,548.31