Finding the Fourth Proportional to 105,492.88, 145,580.22 and 57,746.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,492.88 : 145,580.22 = 57,746.50 : x
2. Step 2: Convert to fraction form
   105,492.88/145,580.22 = 57,746.50/x
3. Step 3: Cross multiply
   105,492.88x = 145,580.22 × 57,746.50
4. Step 4: Simplify right side
   105,492.88x = 8,406,748,174.23
5. Step 5: Solve for x
   x = 8,406,748,174.23/105,492.88
6. Step 6: Final answer
   x = 79,690.19