Finding the Fourth Proportional to 78,476.55, 108,302.06 and 42,665.79

Step by Step Solution

1. Step 1: Write the proportion equation
   78,476.55 : 108,302.06 = 42,665.79 : x
2. Step 2: Convert to fraction form
   78,476.55/108,302.06 = 42,665.79/x
3. Step 3: Cross multiply
   78,476.55x = 108,302.06 × 42,665.79
4. Step 4: Simplify right side
   78,476.55x = 4,620,792,852.13
5. Step 5: Solve for x
   x = 4,620,792,852.13/78,476.55
6. Step 6: Final answer
   x = 58,881.20