Finding the Fourth Proportional to 101,156.78, 139,587.52 and 64,794.08

Step by Step Solution

1. Step 1: Write the proportion equation
   101,156.78 : 139,587.52 = 64,794.08 : x
2. Step 2: Convert to fraction form
   101,156.78/139,587.52 = 64,794.08/x
3. Step 3: Cross multiply
   101,156.78x = 139,587.52 × 64,794.08
4. Step 4: Simplify right side
   101,156.78x = 9,044,444,461.17
5. Step 5: Solve for x
   x = 9,044,444,461.17/101,156.78
6. Step 6: Final answer
   x = 89,410.16