Finding the Fourth Proportional to 189,683.83, 284,442.59 and 71,272.05

Step by Step Solution

1. Step 1: Write the proportion equation
   189,683.83 : 284,442.59 = 71,272.05 : x
2. Step 2: Convert to fraction form
   189,683.83/284,442.59 = 71,272.05/x
3. Step 3: Cross multiply
   189,683.83x = 284,442.59 × 71,272.05
4. Step 4: Simplify right side
   189,683.83x = 20,272,806,807.21
5. Step 5: Solve for x
   x = 20,272,806,807.21/189,683.83
6. Step 6: Final answer
   x = 106,876.83