Finding the Fourth Proportional to 156,173.55, 215,882.69 and 139,344.59

Step by Step Solution

1. Step 1: Write the proportion equation
   156,173.55 : 215,882.69 = 139,344.59 : x
2. Step 2: Convert to fraction form
   156,173.55/215,882.69 = 139,344.59/x
3. Step 3: Cross multiply
   156,173.55x = 215,882.69 × 139,344.59
4. Step 4: Simplify right side
   156,173.55x = 30,082,083,150.01
5. Step 5: Solve for x
   x = 30,082,083,150.01/156,173.55
6. Step 6: Final answer
   x = 192,619.58