Finding the Fourth Proportional to 99,323.60, 137,035.56 and 56,874.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,323.60 : 137,035.56 = 56,874.32 : x
2. Step 2: Convert to fraction form
   99,323.60/137,035.56 = 56,874.32/x
3. Step 3: Cross multiply
   99,323.60x = 137,035.56 × 56,874.32
4. Step 4: Simplify right side
   99,323.60x = 7,793,804,290.82
5. Step 5: Solve for x
   x = 7,793,804,290.82/99,323.60
6. Step 6: Final answer
   x = 78,468.81