Finding the Fourth Proportional to 99,772.52, 137,736.86 and 77,060.52

Step by Step Solution

1. Step 1: Write the proportion equation
   99,772.52 : 137,736.86 = 77,060.52 : x
2. Step 2: Convert to fraction form
   99,772.52/137,736.86 = 77,060.52/x
3. Step 3: Cross multiply
   99,772.52x = 137,736.86 × 77,060.52
4. Step 4: Simplify right side
   99,772.52x = 10,614,074,054.77
5. Step 5: Solve for x
   x = 10,614,074,054.77/99,772.52
6. Step 6: Final answer
   x = 106,382.74