Finding the Fourth Proportional to 141,138.56, 194,763.94 and 83,780.30

Step by Step Solution

1. Step 1: Write the proportion equation
   141,138.56 : 194,763.94 = 83,780.30 : x
2. Step 2: Convert to fraction form
   141,138.56/194,763.94 = 83,780.30/x
3. Step 3: Cross multiply
   141,138.56x = 194,763.94 × 83,780.30
4. Step 4: Simplify right side
   141,138.56x = 16,317,381,322.38
5. Step 5: Solve for x
   x = 16,317,381,322.38/141,138.56
6. Step 6: Final answer
   x = 115,612.50