Finding the Fourth Proportional to 78,665.06, 108,557.88 and 42,855.16

Step by Step Solution

1. Step 1: Write the proportion equation
   78,665.06 : 108,557.88 = 42,855.16 : x
2. Step 2: Convert to fraction form
   78,665.06/108,557.88 = 42,855.16/x
3. Step 3: Cross multiply
   78,665.06x = 108,557.88 × 42,855.16
4. Step 4: Simplify right side
   78,665.06x = 4,652,265,316.66
5. Step 5: Solve for x
   x = 4,652,265,316.66/78,665.06
6. Step 6: Final answer
   x = 59,140.17