Finding the Fourth Proportional to 99,803.90, 149,763.25 and 55,426.93

Step by Step Solution

1. Step 1: Write the proportion equation
   99,803.90 : 149,763.25 = 55,426.93 : x
2. Step 2: Convert to fraction form
   99,803.90/149,763.25 = 55,426.93/x
3. Step 3: Cross multiply
   99,803.90x = 149,763.25 × 55,426.93
4. Step 4: Simplify right side
   99,803.90x = 8,300,917,867.50
5. Step 5: Solve for x
   x = 8,300,917,867.50/99,803.90
6. Step 6: Final answer
   x = 83,172.28