Finding the Fourth Proportional to 155,863.96, 215,106.78 and 88,783

Step by Step Solution

1. Step 1: Write the proportion equation
   155,863.96 : 215,106.78 = 88,783 : x
2. Step 2: Convert to fraction form
   155,863.96/215,106.78 = 88,783/x
3. Step 3: Cross multiply
   155,863.96x = 215,106.78 × 88,783
4. Step 4: Simplify right side
   155,863.96x = 19,097,825,248.74
5. Step 5: Solve for x
   x = 19,097,825,248.74/155,863.96
6. Step 6: Final answer
   x = 122,528.81