Finding the Fourth Proportional to 139,039.45, 191,894.91 and 88,056.92

Step by Step Solution

1. Step 1: Write the proportion equation
   139,039.45 : 191,894.91 = 88,056.92 : x
2. Step 2: Convert to fraction form
   139,039.45/191,894.91 = 88,056.92/x
3. Step 3: Cross multiply
   139,039.45x = 191,894.91 × 88,056.92
4. Step 4: Simplify right side
   139,039.45x = 16,897,674,887.80
5. Step 5: Solve for x
   x = 16,897,674,887.80/139,039.45
6. Step 6: Final answer
   x = 121,531.51