Finding the Fourth Proportional to 139,158.72, 208,475.64 and 107,840.88

Step by Step Solution

1. Step 1: Write the proportion equation
   139,158.72 : 208,475.64 = 107,840.88 : x
2. Step 2: Convert to fraction form
   139,158.72/208,475.64 = 107,840.88/x
3. Step 3: Cross multiply
   139,158.72x = 208,475.64 × 107,840.88
4. Step 4: Simplify right side
   139,158.72x = 22,482,196,476.16
5. Step 5: Solve for x
   x = 22,482,196,476.16/139,158.72
6. Step 6: Final answer
   x = 161,557.94