Finding the Fourth Proportional to 52,312.89, 72,192.57 and 28,439.51

Step by Step Solution

1. Step 1: Write the proportion equation
   52,312.89 : 72,192.57 = 28,439.51 : x
2. Step 2: Convert to fraction form
   52,312.89/72,192.57 = 28,439.51/x
3. Step 3: Cross multiply
   52,312.89x = 72,192.57 × 28,439.51
4. Step 4: Simplify right side
   52,312.89x = 2,053,120,848.83
5. Step 5: Solve for x
   x = 2,053,120,848.83/52,312.89
6. Step 6: Final answer
   x = 39,246.94