Finding the Fourth Proportional to 139,613.95, 207,841.85 and 138,783.58

Step by Step Solution

1. Step 1: Write the proportion equation
   139,613.95 : 207,841.85 = 138,783.58 : x
2. Step 2: Convert to fraction form
   139,613.95/207,841.85 = 138,783.58/x
3. Step 3: Cross multiply
   139,613.95x = 207,841.85 × 138,783.58
4. Step 4: Simplify right side
   139,613.95x = 28,845,034,977.61
5. Step 5: Solve for x
   x = 28,845,034,977.61/139,613.95
6. Step 6: Final answer
   x = 206,605.69