Finding the Fourth Proportional to 78,696.56, 108,603.56 and 42,888.87

Step by Step Solution

1. Step 1: Write the proportion equation
   78,696.56 : 108,603.56 = 42,888.87 : x
2. Step 2: Convert to fraction form
   78,696.56/108,603.56 = 42,888.87/x
3. Step 3: Cross multiply
   78,696.56x = 108,603.56 × 42,888.87
4. Step 4: Simplify right side
   78,696.56x = 4,657,883,751.93
5. Step 5: Solve for x
   x = 4,657,883,751.93/78,696.56
6. Step 6: Final answer
   x = 59,187.90