Finding the Fourth Proportional to 72,384.78, 99,889.83 and 40,553.46

Step by Step Solution

1. Step 1: Write the proportion equation
   72,384.78 : 99,889.83 = 40,553.46 : x
2. Step 2: Convert to fraction form
   72,384.78/99,889.83 = 40,553.46/x
3. Step 3: Cross multiply
   72,384.78x = 99,889.83 × 40,553.46
4. Step 4: Simplify right side
   72,384.78x = 4,050,878,225.31
5. Step 5: Solve for x
   x = 4,050,878,225.31/72,384.78
6. Step 6: Final answer
   x = 55,963.12