Finding the Fourth Proportional to 215,448.71, 297,098.70 and 142,826.34

Step by Step Solution

1. Step 1: Write the proportion equation
   215,448.71 : 297,098.70 = 142,826.34 : x
2. Step 2: Convert to fraction form
   215,448.71/297,098.70 = 142,826.34/x
3. Step 3: Cross multiply
   215,448.71x = 297,098.70 × 142,826.34
4. Step 4: Simplify right side
   215,448.71x = 42,433,519,939.76
5. Step 5: Solve for x
   x = 42,433,519,939.76/215,448.71
6. Step 6: Final answer
   x = 196,954.16