Finding the Fourth Proportional to 147,647.30, 221,325.15 and 72,706.10

Step by Step Solution

1. Step 1: Write the proportion equation
   147,647.30 : 221,325.15 = 72,706.10 : x
2. Step 2: Convert to fraction form
   147,647.30/221,325.15 = 72,706.10/x
3. Step 3: Cross multiply
   147,647.30x = 221,325.15 × 72,706.10
4. Step 4: Simplify right side
   147,647.30x = 16,091,688,488.42
5. Step 5: Solve for x
   x = 16,091,688,488.42/147,647.30
6. Step 6: Final answer
   x = 108,987.35