Finding the Fourth Proportional to 104,411.76, 144,088.32 and 56,665.10

Step by Step Solution

1. Step 1: Write the proportion equation
   104,411.76 : 144,088.32 = 56,665.10 : x
2. Step 2: Convert to fraction form
   104,411.76/144,088.32 = 56,665.10/x
3. Step 3: Cross multiply
   104,411.76x = 144,088.32 × 56,665.10
4. Step 4: Simplify right side
   104,411.76x = 8,164,779,061.63
5. Step 5: Solve for x
   x = 8,164,779,061.63/104,411.76
6. Step 6: Final answer
   x = 78,197.89