Finding the Fourth Proportional to 188,152,801.69, 259,658,243.10 and 128,738,716.80

Step by Step Solution

1. Step 1: Write the proportion equation
   188,152,801.69 : 259,658,243.10 = 128,738,716.80 : x
2. Step 2: Convert to fraction form
   188,152,801.69/259,658,243.10 = 128,738,716.80/x
3. Step 3: Cross multiply
   188,152,801.69x = 259,658,243.10 × 128,738,716.80
4. Step 4: Simplify right side
   188,152,801.69x = 33,428,069,023,236,452
5. Step 5: Solve for x
   x = 33,428,069,023,236,452/188,152,801.69
6. Step 6: Final answer
   x = 177,664,476.55