Finding the Fourth Proportional to 101,821.84, 140,513.72 and 56,506.72

Step by Step Solution

1. Step 1: Write the proportion equation
   101,821.84 : 140,513.72 = 56,506.72 : x
2. Step 2: Convert to fraction form
   101,821.84/140,513.72 = 56,506.72/x
3. Step 3: Cross multiply
   101,821.84x = 140,513.72 × 56,506.72
4. Step 4: Simplify right side
   101,821.84x = 7,939,969,432.20
5. Step 5: Solve for x
   x = 7,939,969,432.20/101,821.84
6. Step 6: Final answer
   x = 77,979.04