Finding the Fourth Proportional to 109,722.90, 164,569.76 and 43,145.15

Step by Step Solution

1. Step 1: Write the proportion equation
   109,722.90 : 164,569.76 = 43,145.15 : x
2. Step 2: Convert to fraction form
   109,722.90/164,569.76 = 43,145.15/x
3. Step 3: Cross multiply
   109,722.90x = 164,569.76 × 43,145.15
4. Step 4: Simplify right side
   109,722.90x = 7,100,386,980.66
5. Step 5: Solve for x
   x = 7,100,386,980.66/109,722.90
6. Step 6: Final answer
   x = 64,711.99