Finding the Fourth Proportional to 99,982.04, 137,784.90 and 71,638.52

Step by Step Solution

1. Step 1: Write the proportion equation
   99,982.04 : 137,784.90 = 71,638.52 : x
2. Step 2: Convert to fraction form
   99,982.04/137,784.90 = 71,638.52/x
3. Step 3: Cross multiply
   99,982.04x = 137,784.90 × 71,638.52
4. Step 4: Simplify right side
   99,982.04x = 9,870,706,314.35
5. Step 5: Solve for x
   x = 9,870,706,314.35/99,982.04
6. Step 6: Final answer
   x = 98,724.79