Finding the Fourth Proportional to 98,784.72, 136,321.86 and 53,461.76

Step by Step Solution

1. Step 1: Write the proportion equation
   98,784.72 : 136,321.86 = 53,461.76 : x
2. Step 2: Convert to fraction form
   98,784.72/136,321.86 = 53,461.76/x
3. Step 3: Cross multiply
   98,784.72x = 136,321.86 × 53,461.76
4. Step 4: Simplify right side
   98,784.72x = 7,288,006,562.07
5. Step 5: Solve for x
   x = 7,288,006,562.07/98,784.72
6. Step 6: Final answer
   x = 73,776.66