Finding the Fourth Proportional to 405,294.22, 607,953.72 and 139,051

Step by Step Solution

1. Step 1: Write the proportion equation
   405,294.22 : 607,953.72 = 139,051 : x
2. Step 2: Convert to fraction form
   405,294.22/607,953.72 = 139,051/x
3. Step 3: Cross multiply
   405,294.22x = 607,953.72 × 139,051
4. Step 4: Simplify right side
   405,294.22x = 84,536,572,719.72
5. Step 5: Solve for x
   x = 84,536,572,719.72/405,294.22
6. Step 6: Final answer
   x = 208,580.75