Finding the Fourth Proportional to 215,615.01, 297,522.91 and 123,729.57

Step by Step Solution

1. Step 1: Write the proportion equation
   215,615.01 : 297,522.91 = 123,729.57 : x
2. Step 2: Convert to fraction form
   215,615.01/297,522.91 = 123,729.57/x
3. Step 3: Cross multiply
   215,615.01x = 297,522.91 × 123,729.57
4. Step 4: Simplify right side
   215,615.01x = 36,812,381,100.80
5. Step 5: Solve for x
   x = 36,812,381,100.80/215,615.01
6. Step 6: Final answer
   x = 170,732.00