Finding the Fourth Proportional to 100,819.76, 139,123.17 and 58,381.02

Step by Step Solution

1. Step 1: Write the proportion equation
   100,819.76 : 139,123.17 = 58,381.02 : x
2. Step 2: Convert to fraction form
   100,819.76/139,123.17 = 58,381.02/x
3. Step 3: Cross multiply
   100,819.76x = 139,123.17 × 58,381.02
4. Step 4: Simplify right side
   100,819.76x = 8,122,152,570.23
5. Step 5: Solve for x
   x = 8,122,152,570.23/100,819.76
6. Step 6: Final answer
   x = 80,561.12