Finding the Fourth Proportional to 137,448.42, 189,678.72 and 77,019.56

Step by Step Solution

1. Step 1: Write the proportion equation
   137,448.42 : 189,678.72 = 77,019.56 : x
2. Step 2: Convert to fraction form
   137,448.42/189,678.72 = 77,019.56/x
3. Step 3: Cross multiply
   137,448.42x = 189,678.72 × 77,019.56
4. Step 4: Simplify right side
   137,448.42x = 14,608,970,607.37
5. Step 5: Solve for x
   x = 14,608,970,607.37/137,448.42
6. Step 6: Final answer
   x = 106,286.93