Finding the Fourth Proportional to 78,779.39, 108,717.59 and 42,969.99

Step by Step Solution

1. Step 1: Write the proportion equation
   78,779.39 : 108,717.59 = 42,969.99 : x
2. Step 2: Convert to fraction form
   78,779.39/108,717.59 = 42,969.99/x
3. Step 3: Cross multiply
   78,779.39x = 108,717.59 × 42,969.99
4. Step 4: Simplify right side
   78,779.39x = 4,671,594,270.24
5. Step 5: Solve for x
   x = 4,671,594,270.24/78,779.39
6. Step 6: Final answer
   x = 59,299.70