Finding the Fourth Proportional to 139,298.83, 208,978.25 and 43,234.04

Step by Step Solution

1. Step 1: Write the proportion equation
   139,298.83 : 208,978.25 = 43,234.04 : x
2. Step 2: Convert to fraction form
   139,298.83/208,978.25 = 43,234.04/x
3. Step 3: Cross multiply
   139,298.83x = 208,978.25 × 43,234.04
4. Step 4: Simplify right side
   139,298.83x = 9,034,974,325.91
5. Step 5: Solve for x
   x = 9,034,974,325.91/139,298.83
6. Step 6: Final answer
   x = 64,860.38