Finding the Fourth Proportional to 139,956.19, 193,139.61 and 79,526.91

Step by Step Solution

1. Step 1: Write the proportion equation
   139,956.19 : 193,139.61 = 79,526.91 : x
2. Step 2: Convert to fraction form
   139,956.19/193,139.61 = 79,526.91/x
3. Step 3: Cross multiply
   139,956.19x = 193,139.61 × 79,526.91
4. Step 4: Simplify right side
   139,956.19x = 15,359,796,807.95
5. Step 5: Solve for x
   x = 15,359,796,807.95/139,956.19
6. Step 6: Final answer
   x = 109,747.18