Finding the Fourth Proportional to 112,419.84, 155,139 and 62,118.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,419.84 : 155,139 = 62,118.72 : x
2. Step 2: Convert to fraction form
   112,419.84/155,139 = 62,118.72/x
3. Step 3: Cross multiply
   112,419.84x = 155,139 × 62,118.72
4. Step 4: Simplify right side
   112,419.84x = 9,637,036,102.08
5. Step 5: Solve for x
   x = 9,637,036,102.08/112,419.84
6. Step 6: Final answer
   x = 85,723.62