Finding the Fourth Proportional to 144,078,851.74, 199,163,910.83 and 128,551,769.57

Step by Step Solution

1. Step 1: Write the proportion equation
   144,078,851.74 : 199,163,910.83 = 128,551,769.57 : x
2. Step 2: Convert to fraction form
   144,078,851.74/199,163,910.83 = 128,551,769.57/x
3. Step 3: Cross multiply
   144,078,851.74x = 199,163,910.83 × 128,551,769.57
4. Step 4: Simplify right side
   144,078,851.74x = 25,602,873,171,678,188
5. Step 5: Solve for x
   x = 25,602,873,171,678,188/144,078,851.74
6. Step 6: Final answer
   x = 177,700,424.89