Finding the Fourth Proportional to 99,928.86, 137,836.53 and 64,062.06

Step by Step Solution

1. Step 1: Write the proportion equation
   99,928.86 : 137,836.53 = 64,062.06 : x
2. Step 2: Convert to fraction form
   99,928.86/137,836.53 = 64,062.06/x
3. Step 3: Cross multiply
   99,928.86x = 137,836.53 × 64,062.06
4. Step 4: Simplify right side
   99,928.86x = 8,830,092,055.05
5. Step 5: Solve for x
   x = 8,830,092,055.05/99,928.86
6. Step 6: Final answer
   x = 88,363.78