Finding the Fourth Proportional to 109,507.60, 164,139.90 and 42,925.60

Step by Step Solution

1. Step 1: Write the proportion equation
   109,507.60 : 164,139.90 = 42,925.60 : x
2. Step 2: Convert to fraction form
   109,507.60/164,139.90 = 42,925.60/x
3. Step 3: Cross multiply
   109,507.60x = 164,139.90 × 42,925.60
4. Step 4: Simplify right side
   109,507.60x = 7,045,803,691.44
5. Step 5: Solve for x
   x = 7,045,803,691.44/109,507.60
6. Step 6: Final answer
   x = 64,340.77