Finding the Fourth Proportional to 139,108.98, 208,385.19 and 64,126.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,108.98 : 208,385.19 = 64,126.56 : x
2. Step 2: Convert to fraction form
   139,108.98/208,385.19 = 64,126.56/x
3. Step 3: Cross multiply
   139,108.98x = 208,385.19 × 64,126.56
4. Step 4: Simplify right side
   139,108.98x = 13,363,025,389.65
5. Step 5: Solve for x
   x = 13,363,025,389.65/139,108.98
6. Step 6: Final answer
   x = 96,061.56