Finding the Fourth Proportional to 78,222.75, 107,947.30 and 42,412.70

Step by Step Solution

1. Step 1: Write the proportion equation
   78,222.75 : 107,947.30 = 42,412.70 : x
2. Step 2: Convert to fraction form
   78,222.75/107,947.30 = 42,412.70/x
3. Step 3: Cross multiply
   78,222.75x = 107,947.30 × 42,412.70
4. Step 4: Simplify right side
   78,222.75x = 4,578,336,450.71
5. Step 5: Solve for x
   x = 4,578,336,450.71/78,222.75
6. Step 6: Final answer
   x = 58,529.47