Finding the Fourth Proportional to 147,911.88, 221,802.06 and 91,749.72

Step by Step Solution

1. Step 1: Write the proportion equation
   147,911.88 : 221,802.06 = 91,749.72 : x
2. Step 2: Convert to fraction form
   147,911.88/221,802.06 = 91,749.72/x
3. Step 3: Cross multiply
   147,911.88x = 221,802.06 × 91,749.72
4. Step 4: Simplify right side
   147,911.88x = 20,350,276,900.42
5. Step 5: Solve for x
   x = 20,350,276,900.42/147,911.88
6. Step 6: Final answer
   x = 137,583.79