Finding the Fourth Proportional to 152,920.90, 229,381.50 and 58,128.80

Step by Step Solution

1. Step 1: Write the proportion equation
   152,920.90 : 229,381.50 = 58,128.80 : x
2. Step 2: Convert to fraction form
   152,920.90/229,381.50 = 58,128.80/x
3. Step 3: Cross multiply
   152,920.90x = 229,381.50 × 58,128.80
4. Step 4: Simplify right side
   152,920.90x = 13,333,671,337.20
5. Step 5: Solve for x
   x = 13,333,671,337.20/152,920.90
6. Step 6: Final answer
   x = 87,193.26