Finding the Fourth Proportional to 109,510.30, 164,233.05 and 42,912.10

Step by Step Solution

1. Step 1: Write the proportion equation
   109,510.30 : 164,233.05 = 42,912.10 : x
2. Step 2: Convert to fraction form
   109,510.30/164,233.05 = 42,912.10/x
3. Step 3: Cross multiply
   109,510.30x = 164,233.05 × 42,912.10
4. Step 4: Simplify right side
   109,510.30x = 7,047,585,064.91
5. Step 5: Solve for x
   x = 7,047,585,064.91/109,510.30
6. Step 6: Final answer
   x = 64,355.45