Finding the Fourth Proportional to 30,710.08, 42,385 and 19,385.76

Step by Step Solution

1. Step 1: Write the proportion equation
   30,710.08 : 42,385 = 19,385.76 : x
2. Step 2: Convert to fraction form
   30,710.08/42,385 = 19,385.76/x
3. Step 3: Cross multiply
   30,710.08x = 42,385 × 19,385.76
4. Step 4: Simplify right side
   30,710.08x = 821,665,437.60
5. Step 5: Solve for x
   x = 821,665,437.60/30,710.08
6. Step 6: Final answer
   x = 26,755.56