Finding the Fourth Proportional to 101,651.34, 140,412.60 and 78,069.39

Step by Step Solution

1. Step 1: Write the proportion equation
   101,651.34 : 140,412.60 = 78,069.39 : x
2. Step 2: Convert to fraction form
   101,651.34/140,412.60 = 78,069.39/x
3. Step 3: Cross multiply
   101,651.34x = 140,412.60 × 78,069.39
4. Step 4: Simplify right side
   101,651.34x = 10,961,926,030.31
5. Step 5: Solve for x
   x = 10,961,926,030.31/101,651.34
6. Step 6: Final answer
   x = 107,838.48