Finding the Fourth Proportional to 78,027.31, 107,677.69 and 42,217.33

Step by Step Solution

1. Step 1: Write the proportion equation
   78,027.31 : 107,677.69 = 42,217.33 : x
2. Step 2: Convert to fraction form
   78,027.31/107,677.69 = 42,217.33/x
3. Step 3: Cross multiply
   78,027.31x = 107,677.69 × 42,217.33
4. Step 4: Simplify right side
   78,027.31x = 4,545,864,274.79
5. Step 5: Solve for x
   x = 4,545,864,274.79/78,027.31
6. Step 6: Final answer
   x = 58,259.91