Finding the Fourth Proportional to 141,298.16, 212,019.94 and 78,106.56

Step by Step Solution

1. Step 1: Write the proportion equation
   141,298.16 : 212,019.94 = 78,106.56 : x
2. Step 2: Convert to fraction form
   141,298.16/212,019.94 = 78,106.56/x
3. Step 3: Cross multiply
   141,298.16x = 212,019.94 × 78,106.56
4. Step 4: Simplify right side
   141,298.16x = 16,560,148,164.81
5. Step 5: Solve for x
   x = 16,560,148,164.81/141,298.16
6. Step 6: Final answer
   x = 117,200.03