Finding the Fourth Proportional to 91,443.84, 137,395.80 and 58,178.76

Step by Step Solution

1. Step 1: Write the proportion equation
   91,443.84 : 137,395.80 = 58,178.76 : x
2. Step 2: Convert to fraction form
   91,443.84/137,395.80 = 58,178.76/x
3. Step 3: Cross multiply
   91,443.84x = 137,395.80 × 58,178.76
4. Step 4: Simplify right side
   91,443.84x = 7,993,517,273.21
5. Step 5: Solve for x
   x = 7,993,517,273.21/91,443.84
6. Step 6: Final answer
   x = 87,414.50