Finding the Fourth Proportional to 82,314.81, 123,472.35 and 19,985.31

Step by Step Solution

1. Step 1: Write the proportion equation
   82,314.81 : 123,472.35 = 19,985.31 : x
2. Step 2: Convert to fraction form
   82,314.81/123,472.35 = 19,985.31/x
3. Step 3: Cross multiply
   82,314.81x = 123,472.35 × 19,985.31
4. Step 4: Simplify right side
   82,314.81x = 2,467,633,191.18
5. Step 5: Solve for x
   x = 2,467,633,191.18/82,314.81
6. Step 6: Final answer
   x = 29,978.00