Finding the Fourth Proportional to 128,132,978.49, 192,269,436.75 and 54,345,281.27

Step by Step Solution

1. Step 1: Write the proportion equation
   128,132,978.49 : 192,269,436.75 = 54,345,281.27 : x
2. Step 2: Convert to fraction form
   128,132,978.49/192,269,436.75 = 54,345,281.27/x
3. Step 3: Cross multiply
   128,132,978.49x = 192,269,436.75 × 54,345,281.27
4. Step 4: Simplify right side
   128,132,978.49x = 10,448,936,618,841,878
5. Step 5: Solve for x
   x = 10,448,936,618,841,878/128,132,978.49
6. Step 6: Final answer
   x = 81,547,597.99