Finding the Fourth Proportional to 101,369.87, 139,859.69 and 70,742.15

Step by Step Solution

1. Step 1: Write the proportion equation
   101,369.87 : 139,859.69 = 70,742.15 : x
2. Step 2: Convert to fraction form
   101,369.87/139,859.69 = 70,742.15/x
3. Step 3: Cross multiply
   101,369.87x = 139,859.69 × 70,742.15
4. Step 4: Simplify right side
   101,369.87x = 9,893,975,168.93
5. Step 5: Solve for x
   x = 9,893,975,168.93/101,369.87
6. Step 6: Final answer
   x = 97,602.72