Finding the Fourth Proportional to 139,045.55, 206,779.50 and 134,616.87

Step by Step Solution

1. Step 1: Write the proportion equation
   139,045.55 : 206,779.50 = 134,616.87 : x
2. Step 2: Convert to fraction form
   139,045.55/206,779.50 = 134,616.87/x
3. Step 3: Cross multiply
   139,045.55x = 206,779.50 × 134,616.87
4. Step 4: Simplify right side
   139,045.55x = 27,836,009,070.17
5. Step 5: Solve for x
   x = 27,836,009,070.17/139,045.55
6. Step 6: Final answer
   x = 200,193.46