Finding the Fourth Proportional to 78,109.07, 117,139.37 and 28,182.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,109.07 : 117,139.37 = 28,182.69 : x
2. Step 2: Convert to fraction form
   78,109.07/117,139.37 = 28,182.69/x
3. Step 3: Cross multiply
   78,109.07x = 117,139.37 × 28,182.69
4. Step 4: Simplify right side
   78,109.07x = 3,301,302,410.59
5. Step 5: Solve for x
   x = 3,301,302,410.59/78,109.07
6. Step 6: Final answer
   x = 42,265.29