Finding the Fourth Proportional to 91,103.28, 136,654.86 and 28,773.78

Step by Step Solution

1. Step 1: Write the proportion equation
   91,103.28 : 136,654.86 = 28,773.78 : x
2. Step 2: Convert to fraction form
   91,103.28/136,654.86 = 28,773.78/x
3. Step 3: Cross multiply
   91,103.28x = 136,654.86 × 28,773.78
4. Step 4: Simplify right side
   91,103.28x = 3,932,076,877.57
5. Step 5: Solve for x
   x = 3,932,076,877.57/91,103.28
6. Step 6: Final answer
   x = 43,160.65