Finding the Fourth Proportional to 100,881.88, 139,211.58 and 56,167

Step by Step Solution

1. Step 1: Write the proportion equation
   100,881.88 : 139,211.58 = 56,167 : x
2. Step 2: Convert to fraction form
   100,881.88/139,211.58 = 56,167/x
3. Step 3: Cross multiply
   100,881.88x = 139,211.58 × 56,167
4. Step 4: Simplify right side
   100,881.88x = 7,819,096,813.86
5. Step 5: Solve for x
   x = 7,819,096,813.86/100,881.88
6. Step 6: Final answer
   x = 77,507.45