Finding the Fourth Proportional to 139,031.82, 191,856.47 and 78,598.87

Step by Step Solution

1. Step 1: Write the proportion equation
   139,031.82 : 191,856.47 = 78,598.87 : x
2. Step 2: Convert to fraction form
   139,031.82/191,856.47 = 78,598.87/x
3. Step 3: Cross multiply
   139,031.82x = 191,856.47 × 78,598.87
4. Step 4: Simplify right side
   139,031.82x = 15,079,700,871.55
5. Step 5: Solve for x
   x = 15,079,700,871.55/139,031.82
6. Step 6: Final answer
   x = 108,462.23