Finding the Fourth Proportional to 101,179,271.80, 139,627,428.78 and 54,769,382.20

Step by Step Solution

1. Step 1: Write the proportion equation
   101,179,271.80 : 139,627,428.78 = 54,769,382.20 : x
2. Step 2: Convert to fraction form
   101,179,271.80/139,627,428.78 = 54,769,382.20/x
3. Step 3: Cross multiply
   101,179,271.80x = 139,627,428.78 × 54,769,382.20
4. Step 4: Simplify right side
   101,179,271.80x = 7,647,308,012,455,100
5. Step 5: Solve for x
   x = 7,647,308,012,455,100/101,179,271.80
6. Step 6: Final answer
   x = 75,581,765.68