Finding the Fourth Proportional to 78,429.95, 108,231.14 and 42,618.77

Step by Step Solution

1. Step 1: Write the proportion equation
   78,429.95 : 108,231.14 = 42,618.77 : x
2. Step 2: Convert to fraction form
   78,429.95/108,231.14 = 42,618.77/x
3. Step 3: Cross multiply
   78,429.95x = 108,231.14 × 42,618.77
4. Step 4: Simplify right side
   78,429.95x = 4,612,677,308.25
5. Step 5: Solve for x
   x = 4,612,677,308.25/78,429.95
6. Step 6: Final answer
   x = 58,812.71