Finding the Fourth Proportional to 104,978.71, 144,873.38 and 64,719.07

Step by Step Solution

1. Step 1: Write the proportion equation
   104,978.71 : 144,873.38 = 64,719.07 : x
2. Step 2: Convert to fraction form
   104,978.71/144,873.38 = 64,719.07/x
3. Step 3: Cross multiply
   104,978.71x = 144,873.38 × 64,719.07
4. Step 4: Simplify right side
   104,978.71x = 9,376,070,421.36
5. Step 5: Solve for x
   x = 9,376,070,421.36/104,978.71
6. Step 6: Final answer
   x = 89,314.02