Finding the Fourth Proportional to 52,389.30, 72,321.60 and 30,872.26

Step by Step Solution

1. Step 1: Write the proportion equation
   52,389.30 : 72,321.60 = 30,872.26 : x
2. Step 2: Convert to fraction form
   52,389.30/72,321.60 = 30,872.26/x
3. Step 3: Cross multiply
   52,389.30x = 72,321.60 × 30,872.26
4. Step 4: Simplify right side
   52,389.30x = 2,232,731,238.82
5. Step 5: Solve for x
   x = 2,232,731,238.82/52,389.30
6. Step 6: Final answer
   x = 42,618.08