Finding the Fourth Proportional to 91,610.52, 137,435.40 and 28,429.26

Step by Step Solution

1. Step 1: Write the proportion equation
   91,610.52 : 137,435.40 = 28,429.26 : x
2. Step 2: Convert to fraction form
   91,610.52/137,435.40 = 28,429.26/x
3. Step 3: Cross multiply
   91,610.52x = 137,435.40 × 28,429.26
4. Step 4: Simplify right side
   91,610.52x = 3,907,186,719.80
5. Step 5: Solve for x
   x = 3,907,186,719.80/91,610.52
6. Step 6: Final answer
   x = 42,649.98