Finding the Fourth Proportional to 78,630.57, 108,511.91 and 42,820.58

Step by Step Solution

1. Step 1: Write the proportion equation
   78,630.57 : 108,511.91 = 42,820.58 : x
2. Step 2: Convert to fraction form
   78,630.57/108,511.91 = 42,820.58/x
3. Step 3: Cross multiply
   78,630.57x = 108,511.91 × 42,820.58
4. Step 4: Simplify right side
   78,630.57x = 4,646,543,140.86
5. Step 5: Solve for x
   x = 4,646,543,140.86/78,630.57
6. Step 6: Final answer
   x = 59,093.34