Finding the Fourth Proportional to 52,171.24, 78,081.90 and 42,810.88

Step by Step Solution

1. Step 1: Write the proportion equation
   52,171.24 : 78,081.90 = 42,810.88 : x
2. Step 2: Convert to fraction form
   52,171.24/78,081.90 = 42,810.88/x
3. Step 3: Cross multiply
   52,171.24x = 78,081.90 × 42,810.88
4. Step 4: Simplify right side
   52,171.24x = 3,342,754,851.07
5. Step 5: Solve for x
   x = 3,342,754,851.07/52,171.24
6. Step 6: Final answer
   x = 64,072.75