Finding the Fourth Proportional to 52,259.16, 72,118.17 and 28,386.30

Step by Step Solution

1. Step 1: Write the proportion equation
   52,259.16 : 72,118.17 = 28,386.30 : x
2. Step 2: Convert to fraction form
   52,259.16/72,118.17 = 28,386.30/x
3. Step 3: Cross multiply
   52,259.16x = 72,118.17 × 28,386.30
4. Step 4: Simplify right side
   52,259.16x = 2,047,168,009.07
5. Step 5: Solve for x
   x = 2,047,168,009.07/52,259.16
6. Step 6: Final answer
   x = 39,173.38