Finding the Fourth Proportional to 52,128.08, 78,300.42 and 42,144.10

Step by Step Solution

1. Step 1: Write the proportion equation
   52,128.08 : 78,300.42 = 42,144.10 : x
2. Step 2: Convert to fraction form
   52,128.08/78,300.42 = 42,144.10/x
3. Step 3: Cross multiply
   52,128.08x = 78,300.42 × 42,144.10
4. Step 4: Simplify right side
   52,128.08x = 3,299,900,730.52
5. Step 5: Solve for x
   x = 3,299,900,730.52/52,128.08
6. Step 6: Final answer
   x = 63,303.71