Finding the Fourth Proportional to 78,022.70, 107,671.34 and 42,212.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,022.70 : 107,671.34 = 42,212.69 : x
2. Step 2: Convert to fraction form
   78,022.70/107,671.34 = 42,212.69/x
3. Step 3: Cross multiply
   78,022.70x = 107,671.34 × 42,212.69
4. Step 4: Simplify right side
   78,022.70x = 4,545,096,897.30
5. Step 5: Solve for x
   x = 4,545,096,897.30/78,022.70
6. Step 6: Final answer
   x = 58,253.52