Finding the Fourth Proportional to 37,870.81, 52,264.71 and 20,878.07

Step by Step Solution

1. Step 1: Write the proportion equation
   37,870.81 : 52,264.71 = 20,878.07 : x
2. Step 2: Convert to fraction form
   37,870.81/52,264.71 = 20,878.07/x
3. Step 3: Cross multiply
   37,870.81x = 52,264.71 × 20,878.07
4. Step 4: Simplify right side
   37,870.81x = 1,091,186,012.59
5. Step 5: Solve for x
   x = 1,091,186,012.59/37,870.81
6. Step 6: Final answer
   x = 28,813.38