Finding the Fourth Proportional to 101,178.72, 139,637.52 and 63,465.12

Step by Step Solution

1. Step 1: Write the proportion equation
   101,178.72 : 139,637.52 = 63,465.12 : x
2. Step 2: Convert to fraction form
   101,178.72/139,637.52 = 63,465.12/x
3. Step 3: Cross multiply
   101,178.72x = 139,637.52 × 63,465.12
4. Step 4: Simplify right side
   101,178.72x = 8,862,111,963.30
5. Step 5: Solve for x
   x = 8,862,111,963.30/101,178.72
6. Step 6: Final answer
   x = 87,588.69