Finding the Fourth Proportional to 109,507.89, 164,279.58 and 42,911.91

Step by Step Solution

1. Step 1: Write the proportion equation
   109,507.89 : 164,279.58 = 42,911.91 : x
2. Step 2: Convert to fraction form
   109,507.89/164,279.58 = 42,911.91/x
3. Step 3: Cross multiply
   109,507.89x = 164,279.58 × 42,911.91
4. Step 4: Simplify right side
   109,507.89x = 7,049,550,551.80
5. Step 5: Solve for x
   x = 7,049,550,551.80/109,507.89
6. Step 6: Final answer
   x = 64,374.82