Finding the Fourth Proportional to 99,947.02, 137,913.55 and 64,185.47

Step by Step Solution

1. Step 1: Write the proportion equation
   99,947.02 : 137,913.55 = 64,185.47 : x
2. Step 2: Convert to fraction form
   99,947.02/137,913.55 = 64,185.47/x
3. Step 3: Cross multiply
   99,947.02x = 137,913.55 × 64,185.47
4. Step 4: Simplify right side
   99,947.02x = 8,852,046,026.12
5. Step 5: Solve for x
   x = 8,852,046,026.12/99,947.02
6. Step 6: Final answer
   x = 88,567.38