Finding the Fourth Proportional to 91,113.04, 136,671.18 and 28,783

Step by Step Solution

1. Step 1: Write the proportion equation
   91,113.04 : 136,671.18 = 28,783 : x
2. Step 2: Convert to fraction form
   91,113.04/136,671.18 = 28,783/x
3. Step 3: Cross multiply
   91,113.04x = 136,671.18 × 28,783
4. Step 4: Simplify right side
   91,113.04x = 3,933,806,573.94
5. Step 5: Solve for x
   x = 3,933,806,573.94/91,113.04
6. Step 6: Final answer
   x = 43,175.01