Finding the Fourth Proportional to 78,466.68, 108,284.70 and 42,656.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,466.68 : 108,284.70 = 42,656.72 : x
2. Step 2: Convert to fraction form
   78,466.68/108,284.70 = 42,656.72/x
3. Step 3: Cross multiply
   78,466.68x = 108,284.70 × 42,656.72
4. Step 4: Simplify right side
   78,466.68x = 4,619,069,586.76
5. Step 5: Solve for x
   x = 4,619,069,586.76/78,466.68
6. Step 6: Final answer
   x = 58,866.64