Finding the Fourth Proportional to 78,669.64, 117,978.94 and 26,065

Step by Step Solution

1. Step 1: Write the proportion equation
   78,669.64 : 117,978.94 = 26,065 : x
2. Step 2: Convert to fraction form
   78,669.64/117,978.94 = 26,065/x
3. Step 3: Cross multiply
   78,669.64x = 117,978.94 × 26,065
4. Step 4: Simplify right side
   78,669.64x = 3,075,121,071.10
5. Step 5: Solve for x
   x = 3,075,121,071.10/78,669.64
6. Step 6: Final answer
   x = 39,089.04