Finding the Fourth Proportional to 102,709.30, 154,323.15 and 65,287.30

Step by Step Solution

1. Step 1: Write the proportion equation
   102,709.30 : 154,323.15 = 65,287.30 : x
2. Step 2: Convert to fraction form
   102,709.30/154,323.15 = 65,287.30/x
3. Step 3: Cross multiply
   102,709.30x = 154,323.15 × 65,287.30
4. Step 4: Simplify right side
   102,709.30x = 10,075,341,791.00
5. Step 5: Solve for x
   x = 10,075,341,791.00/102,709.30
6. Step 6: Final answer
   x = 98,095.71