Finding the Fourth Proportional to 37,870.42, 52,260.45 and 20,642.93

Step by Step Solution

1. Step 1: Write the proportion equation
   37,870.42 : 52,260.45 = 20,642.93 : x
2. Step 2: Convert to fraction form
   37,870.42/52,260.45 = 20,642.93/x
3. Step 3: Cross multiply
   37,870.42x = 52,260.45 × 20,642.93
4. Step 4: Simplify right side
   37,870.42x = 1,078,808,980.48
5. Step 5: Solve for x
   x = 1,078,808,980.48/37,870.42
6. Step 6: Final answer
   x = 28,486.85