Finding the Fourth Proportional to 153,628.50, 230,442.89 and 42,820.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,628.50 : 230,442.89 = 42,820.50 : x
2. Step 2: Convert to fraction form
   153,628.50/230,442.89 = 42,820.50/x
3. Step 3: Cross multiply
   153,628.50x = 230,442.89 × 42,820.50
4. Step 4: Simplify right side
   153,628.50x = 9,867,679,557.14
5. Step 5: Solve for x
   x = 9,867,679,557.14/153,628.50
6. Step 6: Final answer
   x = 64,230.79