Finding the Fourth Proportional to 98,818.72, 136,368.48 and 54,106.72

Step by Step Solution

1. Step 1: Write the proportion equation
   98,818.72 : 136,368.48 = 54,106.72 : x
2. Step 2: Convert to fraction form
   98,818.72/136,368.48 = 54,106.72/x
3. Step 3: Cross multiply
   98,818.72x = 136,368.48 × 54,106.72
4. Step 4: Simplify right side
   98,818.72x = 7,378,451,164.19
5. Step 5: Solve for x
   x = 7,378,451,164.19/98,818.72
6. Step 6: Final answer
   x = 74,666.53