Finding the Fourth Proportional to 76,446.42, 105,492.48 and 42,457.10

Step by Step Solution

1. Step 1: Write the proportion equation
   76,446.42 : 105,492.48 = 42,457.10 : x
2. Step 2: Convert to fraction form
   76,446.42/105,492.48 = 42,457.10/x
3. Step 3: Cross multiply
   76,446.42x = 105,492.48 × 42,457.10
4. Step 4: Simplify right side
   76,446.42x = 4,478,904,772.61
5. Step 5: Solve for x
   x = 4,478,904,772.61/76,446.42
6. Step 6: Final answer
   x = 58,588.81