Finding the Fourth Proportional to 109,618.30, 164,363.64 and 42,980.32

Step by Step Solution

1. Step 1: Write the proportion equation
   109,618.30 : 164,363.64 = 42,980.32 : x
2. Step 2: Convert to fraction form
   109,618.30/164,363.64 = 42,980.32/x
3. Step 3: Cross multiply
   109,618.30x = 164,363.64 × 42,980.32
4. Step 4: Simplify right side
   109,618.30x = 7,064,401,843.56
5. Step 5: Solve for x
   x = 7,064,401,843.56/109,618.30
6. Step 6: Final answer
   x = 64,445.46