Finding the Fourth Proportional to 139,190.88, 208,682.64 and 83,773.92

Step by Step Solution

1. Step 1: Write the proportion equation
   139,190.88 : 208,682.64 = 83,773.92 : x
2. Step 2: Convert to fraction form
   139,190.88/208,682.64 = 83,773.92/x
3. Step 3: Cross multiply
   139,190.88x = 208,682.64 × 83,773.92
4. Step 4: Simplify right side
   139,190.88x = 17,482,162,788.75
5. Step 5: Solve for x
   x = 17,482,162,788.75/139,190.88
6. Step 6: Final answer
   x = 125,598.48