Finding the Fourth Proportional to 109,477.90, 164,221.71 and 42,912.10

Step by Step Solution

1. Step 1: Write the proportion equation
   109,477.90 : 164,221.71 = 42,912.10 : x
2. Step 2: Convert to fraction form
   109,477.90/164,221.71 = 42,912.10/x
3. Step 3: Cross multiply
   109,477.90x = 164,221.71 × 42,912.10
4. Step 4: Simplify right side
   109,477.90x = 7,047,098,441.69
5. Step 5: Solve for x
   x = 7,047,098,441.69/109,477.90
6. Step 6: Final answer
   x = 64,370.05