Finding the Fourth Proportional to 191,426.99, 287,057.21 and 58,276.06

Step by Step Solution

1. Step 1: Write the proportion equation
   191,426.99 : 287,057.21 = 58,276.06 : x
2. Step 2: Convert to fraction form
   191,426.99/287,057.21 = 58,276.06/x
3. Step 3: Cross multiply
   191,426.99x = 287,057.21 × 58,276.06
4. Step 4: Simplify right side
   191,426.99x = 16,728,562,184.37
5. Step 5: Solve for x
   x = 16,728,562,184.37/191,426.99
6. Step 6: Final answer
   x = 87,388.74