Finding the Fourth Proportional to 91,449.60, 137,404.80 and 58,185.60

Step by Step Solution

1. Step 1: Write the proportion equation
   91,449.60 : 137,404.80 = 58,185.60 : x
2. Step 2: Convert to fraction form
   91,449.60/137,404.80 = 58,185.60/x
3. Step 3: Cross multiply
   91,449.60x = 137,404.80 × 58,185.60
4. Step 4: Simplify right side
   91,449.60x = 7,994,980,730.88
5. Step 5: Solve for x
   x = 7,994,980,730.88/91,449.60
6. Step 6: Final answer
   x = 87,424.99