Finding the Fourth Proportional to 78,507.09, 108,338.74 and 42,696.33

Step by Step Solution

1. Step 1: Write the proportion equation
   78,507.09 : 108,338.74 = 42,696.33 : x
2. Step 2: Convert to fraction form
   78,507.09/108,338.74 = 42,696.33/x
3. Step 3: Cross multiply
   78,507.09x = 108,338.74 × 42,696.33
4. Step 4: Simplify right side
   78,507.09x = 4,625,666,594.82
5. Step 5: Solve for x
   x = 4,625,666,594.82/78,507.09
6. Step 6: Final answer
   x = 58,920.37