Finding the Fourth Proportional to 109,419.80, 164,063.98 and 42,780.52

Step by Step Solution

1. Step 1: Write the proportion equation
   109,419.80 : 164,063.98 = 42,780.52 : x
2. Step 2: Convert to fraction form
   109,419.80/164,063.98 = 42,780.52/x
3. Step 3: Cross multiply
   109,419.80x = 164,063.98 × 42,780.52
4. Step 4: Simplify right side
   109,419.80x = 7,018,742,636.23
5. Step 5: Solve for x
   x = 7,018,742,636.23/109,419.80
6. Step 6: Final answer
   x = 64,145.09