Finding the Fourth Proportional to 91,599.98, 137,419.58 and 28,418.74

Step by Step Solution

1. Step 1: Write the proportion equation
   91,599.98 : 137,419.58 = 28,418.74 : x
2. Step 2: Convert to fraction form
   91,599.98/137,419.58 = 28,418.74/x
3. Step 3: Cross multiply
   91,599.98x = 137,419.58 × 28,418.74
4. Step 4: Simplify right side
   91,599.98x = 3,905,291,042.43
5. Step 5: Solve for x
   x = 3,905,291,042.43/91,599.98
6. Step 6: Final answer
   x = 42,634.19