Finding the Fourth Proportional to 31,779.88, 43,864.74 and 19,836.02

Step by Step Solution

1. Step 1: Write the proportion equation
   31,779.88 : 43,864.74 = 19,836.02 : x
2. Step 2: Convert to fraction form
   31,779.88/43,864.74 = 19,836.02/x
3. Step 3: Cross multiply
   31,779.88x = 43,864.74 × 19,836.02
4. Step 4: Simplify right side
   31,779.88x = 870,101,969.60
5. Step 5: Solve for x
   x = 870,101,969.60/31,779.88
6. Step 6: Final answer
   x = 27,379.02