Finding the Fourth Proportional to 56,309, 77,706.98 and 31,159.04

Step by Step Solution

1. Step 1: Write the proportion equation
   56,309 : 77,706.98 = 31,159.04 : x
2. Step 2: Convert to fraction form
   56,309/77,706.98 = 31,159.04/x
3. Step 3: Cross multiply
   56,309x = 77,706.98 × 31,159.04
4. Step 4: Simplify right side
   56,309x = 2,421,274,898.10
5. Step 5: Solve for x
   x = 2,421,274,898.10/56,309
6. Step 6: Final answer
   x = 42,999.79