Finding the Fourth Proportional to 128,719.69, 177,597.18 and 101,411.00

Step by Step Solution

1. Step 1: Write the proportion equation
   128,719.69 : 177,597.18 = 101,411.00 : x
2. Step 2: Convert to fraction form
   128,719.69/177,597.18 = 101,411.00/x
3. Step 3: Cross multiply
   128,719.69x = 177,597.18 × 101,411.00
4. Step 4: Simplify right side
   128,719.69x = 18,010,307,398.98
5. Step 5: Solve for x
   x = 18,010,307,398.98/128,719.69
6. Step 6: Final answer
   x = 139,918.82