Finding the Fourth Proportional to 101,649.84, 140,410.53 and 78,067.89

Step by Step Solution

1. Step 1: Write the proportion equation
   101,649.84 : 140,410.53 = 78,067.89 : x
2. Step 2: Convert to fraction form
   101,649.84/140,410.53 = 78,067.89/x
3. Step 3: Cross multiply
   101,649.84x = 140,410.53 × 78,067.89
4. Step 4: Simplify right side
   101,649.84x = 10,961,553,810.88
5. Step 5: Solve for x
   x = 10,961,553,810.88/101,649.84
6. Step 6: Final answer
   x = 107,836.41