Finding the Fourth Proportional to 141,810.72, 195,699.15 and 77,280.45

Step by Step Solution

1. Step 1: Write the proportion equation
   141,810.72 : 195,699.15 = 77,280.45 : x
2. Step 2: Convert to fraction form
   141,810.72/195,699.15 = 77,280.45/x
3. Step 3: Cross multiply
   141,810.72x = 195,699.15 × 77,280.45
4. Step 4: Simplify right side
   141,810.72x = 15,123,718,376.62
5. Step 5: Solve for x
   x = 15,123,718,376.62/141,810.72
6. Step 6: Final answer
   x = 106,647.22