Finding the Fourth Proportional to 139,726.32, 209,601.96 and 39,884.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,726.32 : 209,601.96 = 39,884.64 : x
2. Step 2: Convert to fraction form
   139,726.32/209,601.96 = 39,884.64/x
3. Step 3: Cross multiply
   139,726.32x = 209,601.96 × 39,884.64
4. Step 4: Simplify right side
   139,726.32x = 8,359,898,717.89
5. Step 5: Solve for x
   x = 8,359,898,717.89/139,726.32
6. Step 6: Final answer
   x = 59,830.52