Finding the Fourth Proportional to 149,838.30, 206,901.27 and 99,764.70

Step by Step Solution

1. Step 1: Write the proportion equation
   149,838.30 : 206,901.27 = 99,764.70 : x
2. Step 2: Convert to fraction form
   149,838.30/206,901.27 = 99,764.70/x
3. Step 3: Cross multiply
   149,838.30x = 206,901.27 × 99,764.70
4. Step 4: Simplify right side
   149,838.30x = 20,641,443,131.17
5. Step 5: Solve for x
   x = 20,641,443,131.17/149,838.30
6. Step 6: Final answer
   x = 137,758.12