Finding the Fourth Proportional to 78,141.78, 107,835.30 and 42,331.68

Step by Step Solution

1. Step 1: Write the proportion equation
   78,141.78 : 107,835.30 = 42,331.68 : x
2. Step 2: Convert to fraction form
   78,141.78/107,835.30 = 42,331.68/x
3. Step 3: Cross multiply
   78,141.78x = 107,835.30 × 42,331.68
4. Step 4: Simplify right side
   78,141.78x = 4,564,849,412.30
5. Step 5: Solve for x
   x = 4,564,849,412.30/78,141.78
6. Step 6: Final answer
   x = 58,417.53