Finding the Fourth Proportional to 101,089.61, 139,504.68 and 55,769.21

Step by Step Solution

1. Step 1: Write the proportion equation
   101,089.61 : 139,504.68 = 55,769.21 : x
2. Step 2: Convert to fraction form
   101,089.61/139,504.68 = 55,769.21/x
3. Step 3: Cross multiply
   101,089.61x = 139,504.68 × 55,769.21
4. Step 4: Simplify right side
   101,089.61x = 7,780,065,097.38
5. Step 5: Solve for x
   x = 7,780,065,097.38/101,089.61
6. Step 6: Final answer
   x = 76,962.07