Finding the Fourth Proportional to 99,185.80, 136,876.98 and 56,746.12

Step by Step Solution

1. Step 1: Write the proportion equation
   99,185.80 : 136,876.98 = 56,746.12 : x
2. Step 2: Convert to fraction form
   99,185.80/136,876.98 = 56,746.12/x
3. Step 3: Cross multiply
   99,185.80x = 136,876.98 × 56,746.12
4. Step 4: Simplify right side
   99,185.80x = 7,767,237,532.32
5. Step 5: Solve for x
   x = 7,767,237,532.32/99,185.80
6. Step 6: Final answer
   x = 78,309.98