Finding the Fourth Proportional to 62,638.20, 86,474.04 and 42,602.04

Step by Step Solution

1. Step 1: Write the proportion equation
   62,638.20 : 86,474.04 = 42,602.04 : x
2. Step 2: Convert to fraction form
   62,638.20/86,474.04 = 42,602.04/x
3. Step 3: Cross multiply
   62,638.20x = 86,474.04 × 42,602.04
4. Step 4: Simplify right side
   62,638.20x = 3,683,970,511.04
5. Step 5: Solve for x
   x = 3,683,970,511.04/62,638.20
6. Step 6: Final answer
   x = 58,813.48