Finding the Fourth Proportional to 143,869,499.10, 215,835,741.45 and 71,121,131.10

Step by Step Solution

1. Step 1: Write the proportion equation
   143,869,499.10 : 215,835,741.45 = 71,121,131.10 : x
2. Step 2: Convert to fraction form
   143,869,499.10/215,835,741.45 = 71,121,131.10/x
3. Step 3: Cross multiply
   143,869,499.10x = 215,835,741.45 × 71,121,131.10
4. Step 4: Simplify right side
   143,869,499.10x = 15,350,482,063,731,152
5. Step 5: Solve for x
   x = 15,350,482,063,731,152/143,869,499.10
6. Step 6: Final answer
   x = 106,697,264.95