Finding the Fourth Proportional to 143,321.68, 215,021.40 and 49,834.72

Step by Step Solution

1. Step 1: Write the proportion equation
   143,321.68 : 215,021.40 = 49,834.72 : x
2. Step 2: Convert to fraction form
   143,321.68/215,021.40 = 49,834.72/x
3. Step 3: Cross multiply
   143,321.68x = 215,021.40 × 49,834.72
4. Step 4: Simplify right side
   143,321.68x = 10,715,531,263.01
5. Step 5: Solve for x
   x = 10,715,531,263.01/143,321.68
6. Step 6: Final answer
   x = 74,765.60