Finding the Fourth Proportional to 52,170.74, 78,081.15 and 42,810.38

Step by Step Solution

1. Step 1: Write the proportion equation
   52,170.74 : 78,081.15 = 42,810.38 : x
2. Step 2: Convert to fraction form
   52,170.74/78,081.15 = 42,810.38/x
3. Step 3: Cross multiply
   52,170.74x = 78,081.15 × 42,810.38
4. Step 4: Simplify right side
   52,170.74x = 3,342,683,702.34
5. Step 5: Solve for x
   x = 3,342,683,702.34/52,170.74
6. Step 6: Final answer
   x = 64,072.00