Finding the Fourth Proportional to 78,316.74, 108,077.46 and 42,506.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,316.74 : 108,077.46 = 42,506.74 : x
2. Step 2: Convert to fraction form
   78,316.74/108,077.46 = 42,506.74/x
3. Step 3: Cross multiply
   78,316.74x = 108,077.46 × 42,506.74
4. Step 4: Simplify right side
   78,316.74x = 4,594,020,467.78
5. Step 5: Solve for x
   x = 4,594,020,467.78/78,316.74
6. Step 6: Final answer
   x = 58,659.50