Finding the Fourth Proportional to 91,264.86, 136,910.43 and 28,090.38

Step by Step Solution

1. Step 1: Write the proportion equation
   91,264.86 : 136,910.43 = 28,090.38 : x
2. Step 2: Convert to fraction form
   91,264.86/136,910.43 = 28,090.38/x
3. Step 3: Cross multiply
   91,264.86x = 136,910.43 × 28,090.38
4. Step 4: Simplify right side
   91,264.86x = 3,845,866,004.66
5. Step 5: Solve for x
   x = 3,845,866,004.66/91,264.86
6. Step 6: Final answer
   x = 42,139.61