Finding the Fourth Proportional to 98,808.72, 136,343.22 and 56,364.72

Step by Step Solution

1. Step 1: Write the proportion equation
   98,808.72 : 136,343.22 = 56,364.72 : x
2. Step 2: Convert to fraction form
   98,808.72/136,343.22 = 56,364.72/x
3. Step 3: Cross multiply
   98,808.72x = 136,343.22 × 56,364.72
4. Step 4: Simplify right side
   98,808.72x = 7,684,947,419.20
5. Step 5: Solve for x
   x = 7,684,947,419.20/98,808.72
6. Step 6: Final answer
   x = 77,776.00