Finding the Fourth Proportional to 78,700.82, 108,603.92 and 42,890.04

Step by Step Solution

1. Step 1: Write the proportion equation
   78,700.82 : 108,603.92 = 42,890.04 : x
2. Step 2: Convert to fraction form
   78,700.82/108,603.92 = 42,890.04/x
3. Step 3: Cross multiply
   78,700.82x = 108,603.92 × 42,890.04
4. Step 4: Simplify right side
   78,700.82x = 4,658,026,580.18
5. Step 5: Solve for x
   x = 4,658,026,580.18/78,700.82
6. Step 6: Final answer
   x = 59,186.51