Finding the Fourth Proportional to 56,172.42, 77,522.76 and 31,026.78

Step by Step Solution

1. Step 1: Write the proportion equation
   56,172.42 : 77,522.76 = 31,026.78 : x
2. Step 2: Convert to fraction form
   56,172.42/77,522.76 = 31,026.78/x
3. Step 3: Cross multiply
   56,172.42x = 77,522.76 × 31,026.78
4. Step 4: Simplify right side
   56,172.42x = 2,405,281,619.51
5. Step 5: Solve for x
   x = 2,405,281,619.51/56,172.42
6. Step 6: Final answer
   x = 42,819.62