Finding the Fourth Proportional to 71,310.76, 98,492.16 and 57,019.93

Step by Step Solution

1. Step 1: Write the proportion equation
   71,310.76 : 98,492.16 = 57,019.93 : x
2. Step 2: Convert to fraction form
   71,310.76/98,492.16 = 57,019.93/x
3. Step 3: Cross multiply
   71,310.76x = 98,492.16 × 57,019.93
4. Step 4: Simplify right side
   71,310.76x = 5,616,016,068.75
5. Step 5: Solve for x
   x = 5,616,016,068.75/71,310.76
6. Step 6: Final answer
   x = 78,754.12