Finding the Fourth Proportional to 56,492.79, 84,688.83 and 21,457.05

Step by Step Solution

1. Step 1: Write the proportion equation
   56,492.79 : 84,688.83 = 21,457.05 : x
2. Step 2: Convert to fraction form
   56,492.79/84,688.83 = 21,457.05/x
3. Step 3: Cross multiply
   56,492.79x = 84,688.83 × 21,457.05
4. Step 4: Simplify right side
   56,492.79x = 1,817,172,459.75
5. Step 5: Solve for x
   x = 1,817,172,459.75/56,492.79
6. Step 6: Final answer
   x = 32,166.45