Finding the Fourth Proportional to 82,386.72, 123,482.88 and 37,972.80

Step by Step Solution

1. Step 1: Write the proportion equation
   82,386.72 : 123,482.88 = 37,972.80 : x
2. Step 2: Convert to fraction form
   82,386.72/123,482.88 = 37,972.80/x
3. Step 3: Cross multiply
   82,386.72x = 123,482.88 × 37,972.80
4. Step 4: Simplify right side
   82,386.72x = 4,688,990,705.66
5. Step 5: Solve for x
   x = 4,688,990,705.66/82,386.72
6. Step 6: Final answer
   x = 56,914.40