Finding the Fourth Proportional to 189,061.24, 260,729.20 and 137,993.12

Step by Step Solution

1. Step 1: Write the proportion equation
   189,061.24 : 260,729.20 = 137,993.12 : x
2. Step 2: Convert to fraction form
   189,061.24/260,729.20 = 137,993.12/x
3. Step 3: Cross multiply
   189,061.24x = 260,729.20 × 137,993.12
4. Step 4: Simplify right side
   189,061.24x = 35,978,835,783.10
5. Step 5: Solve for x
   x = 35,978,835,783.10/189,061.24
6. Step 6: Final answer
   x = 190,302.55