Finding the Fourth Proportional to 42,655.10, 63,890.31 and 30,942.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,655.10 : 63,890.31 = 30,942.50 : x
2. Step 2: Convert to fraction form
   42,655.10/63,890.31 = 30,942.50/x
3. Step 3: Cross multiply
   42,655.10x = 63,890.31 × 30,942.50
4. Step 4: Simplify right side
   42,655.10x = 1,976,925,917.18
5. Step 5: Solve for x
   x = 1,976,925,917.18/42,655.10
6. Step 6: Final answer
   x = 46,346.77