Finding the Fourth Proportional to 100,804.53, 139,111.88 and 57,787.83

Step by Step Solution

1. Step 1: Write the proportion equation
   100,804.53 : 139,111.88 = 57,787.83 : x
2. Step 2: Convert to fraction form
   100,804.53/139,111.88 = 57,787.83/x
3. Step 3: Cross multiply
   100,804.53x = 139,111.88 × 57,787.83
4. Step 4: Simplify right side
   100,804.53x = 8,038,973,708.54
5. Step 5: Solve for x
   x = 8,038,973,708.54/100,804.53
6. Step 6: Final answer
   x = 79,748.14