Finding the Fourth Proportional to 91,100.24, 136,654.02 and 28,770.76

Step by Step Solution

1. Step 1: Write the proportion equation
   91,100.24 : 136,654.02 = 28,770.76 : x
2. Step 2: Convert to fraction form
   91,100.24/136,654.02 = 28,770.76/x
3. Step 3: Cross multiply
   91,100.24x = 136,654.02 × 28,770.76
4. Step 4: Simplify right side
   91,100.24x = 3,931,640,012.46
5. Step 5: Solve for x
   x = 3,931,640,012.46/91,100.24
6. Step 6: Final answer
   x = 43,157.30