Finding the Fourth Proportional to 139,123.68, 208,724.24 and 45,695.04

Step by Step Solution

1. Step 1: Write the proportion equation
   139,123.68 : 208,724.24 = 45,695.04 : x
2. Step 2: Convert to fraction form
   139,123.68/208,724.24 = 45,695.04/x
3. Step 3: Cross multiply
   139,123.68x = 208,724.24 × 45,695.04
4. Step 4: Simplify right side
   139,123.68x = 9,537,662,495.77
5. Step 5: Solve for x
   x = 9,537,662,495.77/139,123.68
6. Step 6: Final answer
   x = 68,555.28