Finding the Fourth Proportional to 82,990.17, 124,421.45 and 42,966.24

Step by Step Solution

1. Step 1: Write the proportion equation
   82,990.17 : 124,421.45 = 42,966.24 : x
2. Step 2: Convert to fraction form
   82,990.17/124,421.45 = 42,966.24/x
3. Step 3: Cross multiply
   82,990.17x = 124,421.45 × 42,966.24
4. Step 4: Simplify right side
   82,990.17x = 5,345,921,667.02
5. Step 5: Solve for x
   x = 5,345,921,667.02/82,990.17
6. Step 6: Final answer
   x = 64,416.32