Finding the Fourth Proportional to 461,978.56, 693,033.52 and 142,156.96

Step by Step Solution

1. Step 1: Write the proportion equation
   461,978.56 : 693,033.52 = 142,156.96 : x
2. Step 2: Convert to fraction form
   461,978.56/693,033.52 = 142,156.96/x
3. Step 3: Cross multiply
   461,978.56x = 693,033.52 × 142,156.96
4. Step 4: Simplify right side
   461,978.56x = 98,519,538,381.30
5. Step 5: Solve for x
   x = 98,519,538,381.30/461,978.56
6. Step 6: Final answer
   x = 213,255.65