Finding the Fourth Proportional to 141,820.56, 195,704.88 and 78,146.40

Step by Step Solution

1. Step 1: Write the proportion equation
   141,820.56 : 195,704.88 = 78,146.40 : x
2. Step 2: Convert to fraction form
   141,820.56/195,704.88 = 78,146.40/x
3. Step 3: Cross multiply
   141,820.56x = 195,704.88 × 78,146.40
4. Step 4: Simplify right side
   141,820.56x = 15,293,631,834.43
5. Step 5: Solve for x
   x = 15,293,631,834.43/141,820.56
6. Step 6: Final answer
   x = 107,837.90