Finding the Fourth Proportional to 147,501.45, 221,416.20 and 91,404.90

Step by Step Solution

1. Step 1: Write the proportion equation
   147,501.45 : 221,416.20 = 91,404.90 : x
2. Step 2: Convert to fraction form
   147,501.45/221,416.20 = 91,404.90/x
3. Step 3: Cross multiply
   147,501.45x = 221,416.20 × 91,404.90
4. Step 4: Simplify right side
   147,501.45x = 20,238,525,619.38
5. Step 5: Solve for x
   x = 20,238,525,619.38/147,501.45
6. Step 6: Final answer
   x = 137,208.99