Finding the Fourth Proportional to 31,379.83, 43,280.17 and 21,316.03

Step by Step Solution

1. Step 1: Write the proportion equation
   31,379.83 : 43,280.17 = 21,316.03 : x
2. Step 2: Convert to fraction form
   31,379.83/43,280.17 = 21,316.03/x
3. Step 3: Cross multiply
   31,379.83x = 43,280.17 × 21,316.03
4. Step 4: Simplify right side
   31,379.83x = 922,561,402.13
5. Step 5: Solve for x
   x = 922,561,402.13/31,379.83
6. Step 6: Final answer
   x = 29,399.82