Finding the Fourth Proportional to 55,411.84, 83,056.20 and 42,220.72

Step by Step Solution

1. Step 1: Write the proportion equation
   55,411.84 : 83,056.20 = 42,220.72 : x
2. Step 2: Convert to fraction form
   55,411.84/83,056.20 = 42,220.72/x
3. Step 3: Cross multiply
   55,411.84x = 83,056.20 × 42,220.72
4. Step 4: Simplify right side
   55,411.84x = 3,506,692,564.46
5. Step 5: Solve for x
   x = 3,506,692,564.46/55,411.84
6. Step 6: Final answer
   x = 63,284.17