Finding the Fourth Proportional to 139,056.02, 191,898.78 and 81,697.74

Step by Step Solution

1. Step 1: Write the proportion equation
   139,056.02 : 191,898.78 = 81,697.74 : x
2. Step 2: Convert to fraction form
   139,056.02/191,898.78 = 81,697.74/x
3. Step 3: Cross multiply
   139,056.02x = 191,898.78 × 81,697.74
4. Step 4: Simplify right side
   139,056.02x = 15,677,696,634.76
5. Step 5: Solve for x
   x = 15,677,696,634.76/139,056.02
6. Step 6: Final answer
   x = 112,743.75