Finding the Fourth Proportional to 143,977.79, 216,000.71 and 65,091.89

Step by Step Solution

1. Step 1: Write the proportion equation
   143,977.79 : 216,000.71 = 65,091.89 : x
2. Step 2: Convert to fraction form
   143,977.79/216,000.71 = 65,091.89/x
3. Step 3: Cross multiply
   143,977.79x = 216,000.71 × 65,091.89
4. Step 4: Simplify right side
   143,977.79x = 14,059,893,049.78
5. Step 5: Solve for x
   x = 14,059,893,049.78/143,977.79
6. Step 6: Final answer
   x = 97,653.21