Finding the Fourth Proportional to 139,055.02, 191,897.40 and 81,696.74

Step by Step Solution

1. Step 1: Write the proportion equation
   139,055.02 : 191,897.40 = 81,696.74 : x
2. Step 2: Convert to fraction form
   139,055.02/191,897.40 = 81,696.74/x
3. Step 3: Cross multiply
   139,055.02x = 191,897.40 × 81,696.74
4. Step 4: Simplify right side
   139,055.02x = 15,677,391,994.48
5. Step 5: Solve for x
   x = 15,677,391,994.48/139,055.02
6. Step 6: Final answer
   x = 112,742.37