Finding the Fourth Proportional to 213,061.96, 319,735.50 and 88,402.96

Step by Step Solution

1. Step 1: Write the proportion equation
   213,061.96 : 319,735.50 = 88,402.96 : x
2. Step 2: Convert to fraction form
   213,061.96/319,735.50 = 88,402.96/x
3. Step 3: Cross multiply
   213,061.96x = 319,735.50 × 88,402.96
4. Step 4: Simplify right side
   213,061.96x = 28,265,564,617.08
5. Step 5: Solve for x
   x = 28,265,564,617.08/213,061.96
6. Step 6: Final answer
   x = 132,663.59