Finding the Fourth Proportional to 101,645.34, 140,404.32 and 78,063.39

Step by Step Solution

1. Step 1: Write the proportion equation
   101,645.34 : 140,404.32 = 78,063.39 : x
2. Step 2: Convert to fraction form
   101,645.34/140,404.32 = 78,063.39/x
3. Step 3: Cross multiply
   101,645.34x = 140,404.32 × 78,063.39
4. Step 4: Simplify right side
   101,645.34x = 10,960,437,189.84
5. Step 5: Solve for x
   x = 10,960,437,189.84/101,645.34
6. Step 6: Final answer
   x = 107,830.20