Finding the Fourth Proportional to 139,298.70, 208,978.06 and 43,233.91

Step by Step Solution

1. Step 1: Write the proportion equation
   139,298.70 : 208,978.06 = 43,233.91 : x
2. Step 2: Convert to fraction form
   139,298.70/208,978.06 = 43,233.91/x
3. Step 3: Cross multiply
   139,298.70x = 208,978.06 × 43,233.91
4. Step 4: Simplify right side
   139,298.70x = 9,034,938,638.01
5. Step 5: Solve for x
   x = 9,034,938,638.01/139,298.70
6. Step 6: Final answer
   x = 64,860.18