Finding the Fourth Proportional to 102,047.89, 140,827.77 and 56,109.47

Step by Step Solution

1. Step 1: Write the proportion equation
   102,047.89 : 140,827.77 = 56,109.47 : x
2. Step 2: Convert to fraction form
   102,047.89/140,827.77 = 56,109.47/x
3. Step 3: Cross multiply
   102,047.89x = 140,827.77 × 56,109.47
4. Step 4: Simplify right side
   102,047.89x = 7,901,771,535.98
5. Step 5: Solve for x
   x = 7,901,771,535.98/102,047.89
6. Step 6: Final answer
   x = 77,431.99