Finding the Fourth Proportional to 78,056.57, 107,718.05 and 42,246.57

Step by Step Solution

1. Step 1: Write the proportion equation
   78,056.57 : 107,718.05 = 42,246.57 : x
2. Step 2: Convert to fraction form
   78,056.57/107,718.05 = 42,246.57/x
3. Step 3: Cross multiply
   78,056.57x = 107,718.05 × 42,246.57
4. Step 4: Simplify right side
   78,056.57x = 4,550,718,139.59
5. Step 5: Solve for x
   x = 4,550,718,139.59/78,056.57
6. Step 6: Final answer
   x = 58,300.26