Finding the Fourth Proportional to 103,978.89, 143,492.04 and 56,233.17

Step by Step Solution

1. Step 1: Write the proportion equation
   103,978.89 : 143,492.04 = 56,233.17 : x
2. Step 2: Convert to fraction form
   103,978.89/143,492.04 = 56,233.17/x
3. Step 3: Cross multiply
   103,978.89x = 143,492.04 × 56,233.17
4. Step 4: Simplify right side
   103,978.89x = 8,069,012,278.97
5. Step 5: Solve for x
   x = 8,069,012,278.97/103,978.89
6. Step 6: Final answer
   x = 77,602.41