Finding the Fourth Proportional to 381,429.48, 526,397.31 and 211,663.59

Step by Step Solution

1. Step 1: Write the proportion equation
   381,429.48 : 526,397.31 = 211,663.59 : x
2. Step 2: Convert to fraction form
   381,429.48/526,397.31 = 211,663.59/x
3. Step 3: Cross multiply
   381,429.48x = 526,397.31 × 211,663.59
4. Step 4: Simplify right side
   381,429.48x = 111,419,144,400.94
5. Step 5: Solve for x
   x = 111,419,144,400.94/381,429.48
6. Step 6: Final answer
   x = 292,109.42