Finding the Fourth Proportional to 78,615.83, 108,488.43 and 42,805.26

Step by Step Solution

1. Step 1: Write the proportion equation
   78,615.83 : 108,488.43 = 42,805.26 : x
2. Step 2: Convert to fraction form
   78,615.83/108,488.43 = 42,805.26/x
3. Step 3: Cross multiply
   78,615.83x = 108,488.43 × 42,805.26
4. Step 4: Simplify right side
   78,615.83x = 4,643,875,453.14
5. Step 5: Solve for x
   x = 4,643,875,453.14/78,615.83
6. Step 6: Final answer
   x = 59,070.49