Finding the Fourth Proportional to 101,335.72, 139,843.02 and 56,623.72

Step by Step Solution

1. Step 1: Write the proportion equation
   101,335.72 : 139,843.02 = 56,623.72 : x
2. Step 2: Convert to fraction form
   101,335.72/139,843.02 = 56,623.72/x
3. Step 3: Cross multiply
   101,335.72x = 139,843.02 × 56,623.72
4. Step 4: Simplify right side
   101,335.72x = 7,918,432,008.43
5. Step 5: Solve for x
   x = 7,918,432,008.43/101,335.72
6. Step 6: Final answer
   x = 78,140.58