Finding the Fourth Proportional to 152,613.50, 228,953.05 and 51,421.61

Step by Step Solution

1. Step 1: Write the proportion equation
   152,613.50 : 228,953.05 = 51,421.61 : x
2. Step 2: Convert to fraction form
   152,613.50/228,953.05 = 51,421.61/x
3. Step 3: Cross multiply
   152,613.50x = 228,953.05 × 51,421.61
4. Step 4: Simplify right side
   152,613.50x = 11,773,133,300.65
5. Step 5: Solve for x
   x = 11,773,133,300.65/152,613.50
6. Step 6: Final answer
   x = 77,143.46